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searching for F number (chemistry) 174 found (178 total)

alternate case: f number (chemistry)

F-number (4,701 words) [view diff] no match in snippet view article find links to article

For other uses, see F-number (disambiguation). In optics, the f-number (sometimes called focal ratio, f-ratio, f-stop, or relative aperture) of an
Depth of field (10,113 words) [view diff] no match in snippet view article find links to article
at the film / sensor plane and the selected lens aperture or f-number. For a given f-number, increasing the magnification, either by moving closer to the
Canon MP-E 65mm f/2.8 1–5x Macro lens (474 words) [view diff] no match in snippet view article find links to article
infinity, so its effective f-number depends on the magnification ratio chosen, and is calculated as: Effective f-number = f-number x (magnification + 1) For
Numerical aperture (1,855 words) [view diff] no match in snippet view article find links to article
and illustration of f-number is misleading, and defining it in terms of numerical aperture may be more meaningful. The f-number describes the light-gathering
Aperture (3,745 words) [view diff] no match in snippet view article find links to article
be more important than the actual f-number. Equivalent aperture is the f-number adjusted to correspond to the f-number of the same size absolute aperture
Exposure value (3,040 words) [view diff] no match in snippet view article find links to article
a number that represents a combination of a camera's shutter speed and f-number, such that all combinations that yield the same exposure have the same
Shutter speed (1,884 words) [view diff] no match in snippet view article find links to article
the exposure time. The camera's shutter speed, the lens's brightness (f-number), and the scene's luminance together determine the amount of light that
Pinhole camera (2,864 words) [view diff] no match in snippet view article find links to article
50 mm focal length would have an f-number of 50/0.5, or 100 (f/100 in conventional notation). Due to the large f-number of a pinhole camera, exposures will
Attack in the Pacific (311 words) [view diff] no match in snippet view article find links to article
known by the American series title: Armed Forces Information Film: A.F.I.F. Number 3) is a 1944 American war documentary film. Henry H. Arnold as Himself
Guide number (937 words) [view diff] no match in snippet view article find links to article
and the f-number of the aperture that will correctly expose film or a digital sensor with the specified sensitivity. GN = distance × f-number This simple
Sunny 16 rule (505 words) [view diff] no match in snippet view article find links to article
with other light readings, shutter speed can be changed as long as the f-number is altered to compensate, e.g. 1/250 second at f/11 gives equivalent exposure
Entrance pupil (528 words) [view diff] no match in snippet view article find links to article
used to calibrate the opening and closing of the diaphragm aperture. The f-number ("relative aperture"), N, is defined by N = f/EN, where f is the focal
Tilt–shift photography (2,281 words) [view diff] no match in snippet view article find links to article
far limits of DoF (i.e., the angular DoF) increases with lens f-number; for a given f-number and angle of the PoF, the angular DoF decreases with increasing
Diaphragm (optics) (1,111 words) [view diff] no match in snippet view article find links to article
often referred to simply as an iris. See the articles on aperture and f-number for the photographic effect and system of quantification of varying the
Purple fringing (605 words) [view diff] no match in snippet view article find links to article
aberration is, so the purple fringing can be very dependent on f-number: a larger f-number (smaller aperture) reduces axial aberration. Purple fringing
Defocus aberration (446 words) [view diff] no match in snippet view article find links to article
blurring for a given amount of focus shift depends inversely on the lens f-number. Low f-numbers, such as f/1.4 to f/2.8, are very sensitive to defocus and
Lens speed (2,286 words) [view diff] no match in snippet view article find links to article
diameter, or minimum f-number, of a photographic lens. A lens with a larger maximum aperture (that is, a smaller minimum f-number) is called a "fast lens"
Image sensor format (5,155 words) [view diff] no match in snippet view article find links to article
field. It is equivalent to adjusting the f-number inversely in proportion to crop factor – a smaller f-number for smaller sensors. (This also means that
Depth of focus (899 words) [view diff] no match in snippet view article find links to article
relatively insensitive to focal length and subject distance, for a fixed f-number. In the macro region, depth of focus increases with longer focal length
Light meter (2,729 words) [view diff] no match in snippet view article find links to article
analog, which allows the photographer to determine which shutter speed and f-number should be selected for an optimum exposure, given a certain lighting situation
Dynamic aperture (132 words) [view diff] no match in snippet view article find links to article
resolution. The ratio of the imaging depth to the aperture size is known as the F-number. Dynamic aperture is keeping this number constant by growing the aperture
Petzval lens (148 words) [view diff] no match in snippet view article find links to article
The total field of view is therefore restricted to about 30 degrees. An f-number of f/3.7 was achievable, which was considerably faster than other lenses
Airy disk (2,976 words) [view diff] no match in snippet view article find links to article
on a screen is related to and to the f-number by where R is the distance from the aperture, and the f-number N = R/d is the ratio of observation distance
Nikon 1 series (1,353 words) [view diff] no match in snippet view article find links to article
crop factor) compared to a 35mm FX camera at the same angle of view and f-number. Nikon CX format with 2.7 times crop factor. Although the image sensor
Hyperfocal distance (2,618 words) [view diff] no match in snippet view article find links to article
distance is focal length is f-number ( for aperture diameter ) is the circle of confusion limit For any practical f-number, the added focal length is
Circle of confusion (3,374 words) [view diff] no match in snippet view article find links to article
that where N is the lens f-number, c is the CoC, m is the magnification, and f is the lens focal length. Because the f-number and CoC occur only as the
Kit lens (1,286 words) [view diff] no match in snippet view article find links to article
(smaller f-number) than comparably priced zoom lenses, so the change to zoom lenses means that recent kit lenses are usually also slower (higher f-number). However
Pupil magnification (83 words) [view diff] no match in snippet view article find links to article
pupil. The pupil magnification is used in calculations of the effective f-number, which affects a number of important elements related to optics, such as
F-Stops (197 words) [view diff] no match in snippet view article find links to article
This article is about the jazz album. For the optical ratio, see F-number. F-Stops is an album by American jazz trombonist and composer Craig Harris recorded
Metrogon (272 words) [view diff] no match in snippet view article find links to article
photography on the T-11 camera. The most common Metrogon lenses have a f number of 6.3 and a focal length of 6 inches. The company name Bausch and Lomb
Photography (8,306 words) [view diff] no match in snippet view article find links to article
photograph from coming out blurry. The effective aperture is expressed by an f-number or f-stop (derived from focal ratio), which is proportional to the ratio
Science of photography (2,383 words) [view diff] no match in snippet view article find links to article
field generally increases with decreasing aperture diameter (increasing f-number). The unfocused blur outside the depth of field is sometimes used for artistic
Camera lens (3,408 words) [view diff] no match in snippet view article find links to article
smaller f-number, allows using a faster shutter speed for the same exposure. The maximum usable aperture of a lens is specified as the focal ratio or f-number
Spatial filter (739 words) [view diff] no match in snippet view article find links to article
To use a very small pinhole, one must use a focusing lens with a low f-number, and ideally the lens should not add significant aberrations to the beam
Exposure compensation (1,148 words) [view diff] no match in snippet view article find links to article
doubling of exposure. Exposure can be adjusted by changing either the lens f-number or the exposure time; which one is changed usually depends on the camera's
Men Yang (41 words) [view diff] no match in snippet view article find links to article
5 in) Playing position Striker Club information Current team Guangzhou R&F Number 24 Senior career* Years Team Apps† (Gls)† 2009–2010 Ferencváros 2011
Telecompressor (255 words) [view diff] no match in snippet view article find links to article
film-based SLR (Single-lens reflex cameras), whilst 'magically' gaining a stop (F-number) i.e. giving the performance of a more expensive lens on a cheaper lens
Angular aperture (103 words) [view diff] no match in snippet view article find links to article
(1995). Studies in Optics. Courier Dover. p. 32. ISBN 0-486-68700-7.  f-number Numerical aperture Acceptance angle, half the angular aperture Field of
Function key (2,340 words) [view diff] no match in snippet view article find links to article
default actions printed on/besides them, or they may have the more common "F-number" designations. Soft keys date to avionics multi-function displays
Lazy initialization (2,345 words) [view diff] no match in snippet view article find links to article
(f->name = strdup(name))) { free(f); return NULL; } f->number = ++seq; f->next = fruit_list; fruit_list = f; return f; }
Crop factor (2,006 words) [view diff] no match in snippet view article find links to article
be preferable to using a teleconverter, because the latter affects the f-number of the lens, and can therefore degrade the performance of the autofocus
Cottages (Van Gogh series) (749 words) [view diff] no match in snippet view article find links to article
collection (F1669) Cottage, June–July 1885, Private collection (No F number, JH Add. 23) Rural village at night, Rijksmuseum Amsterdam
Outline of photography (588 words) [view diff] no match in snippet view article find links to article
Autofocus Depth of field Photograph Vignetting Shutter speed Aperture F-number List of photographers List of most expensive photographs List of photographic
Jang Hyun-soo (64 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 15 Youth career 2010–2011 Yonsei University Senior career* Years Team Apps†
Zone plate (1,050 words) [view diff] no match in snippet view article find links to article
larger than that of a comparable pinhole. The result is that the effective f-number of a zone plate is lower than for the corresponding pinhole and the exposure
Prime lens (704 words) [view diff] no match in snippet view article find links to article
simpler, prime lenses usually have a larger maximum aperture (smaller f-number) than zoom lenses. This allows photography in lower light and a shallower
Minolta STF 135mm f/2.8 T4.5 lens (537 words) [view diff] no match in snippet view article find links to article
the lens' aperture ring when set to manual settings T4.5 to T6.7. The f-number in this lens refers to the effective aperture opening and determines the
South African Class F 4-6-4T (728 words) [view diff] no match in snippet view article find links to article
1931. The main picture is a Vulcan Foundry builder’s photograph of Class F number 260. The following pictures show the locomotive in service, and its left
Zhang Shichang (217 words) [view diff] no match in snippet view article find links to article
Playing position Goalkeeper Club information Current team Guangzhou R&F Number 17 Youth career 0000-2007 Tianjin Locomotive 2007-2008 Belenenses 2008
Nokia 808 PureView (1,812 words) [view diff] no match in snippet view article find links to article
length: 25 mm for 16:9, 27 mm for 4:3. f/2.2 Lens Carl Zeiss optics with F-number: f/2.4. Focal length: 8.02 mm: 35 mm equivalent focal length: 26 mm @ 16:9
Film speed (10,622 words) [view diff] no match in snippet view article find links to article
to the photographer to obtain the desired effect: lighting, film speed, f-number (aperture size), and shutter speed (exposure time). The equation may be
Exit pupil (1,040 words) [view diff] no match in snippet view article find links to article
calculated by dividing the focal length of the eyepiece by the focal ratio (f-number) of the telescope. In all but the cheapest telescopes, the eyepieces are
Focus stacking (743 words) [view diff] no match in snippet view article find links to article
field is normally increased by stopping down aperture (using a larger f-number), but beyond a certain point, stopping down causes blurring due to diffraction
Canon PowerShot G (1,768 words) [view diff] no match in snippet view article find links to article
Common features across the early G series were: A fast lens (minimum F number of 2.0). A flip out and twist LCD, along with a smaller status LCD on the
Wang Song (497 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 6 Senior career* Years Team Apps† (Gls)† 2001–2005 Sichuan Quanxing 93
Full-frame digital SLR (2,266 words) [view diff] no match in snippet view article find links to article
the same f-number, the full-frame format will have less DoF. Equivalently, for the same DoF, the full-frame format will require a larger f-number (that is
Nikon D60 (496 words) [view diff] no match in snippet view article find links to article
body (common in higher-end DSLRs), but instead displays shutter speed, f-number, and other information on the main LCD screen. Digital Photography Review
Telescope (2,443 words) [view diff] no match in snippet view article find links to article
control of telescopes Bahtinov mask Bioptic telescope Carey mask Dynameter f-number First light GoTo telescope Hartmann mask Keyhole problem Microscope Remote
Lenses for SLR and DSLR cameras (4,614 words) [view diff] no match in snippet view article find links to article
aperture is specified as an f-number, the ratio of the lens focal length to its effective aperture diameter. A small f-number like f/2.0 indicates a large
Nikon Coolpix 4600 (217 words) [view diff] no match in snippet view article find links to article
on the memory medium. The camera's lens has a focal length of 5.7mm, an f-number of 2.9, as well as a 3× magnification optical zoom. The digital zoom is
Image noise (2,398 words) [view diff] no match in snippet view article find links to article
proportional to sensor area, or that the f-number or focal-plane illuminance is held constant. That is, for a constant f-number, the sensitivity of an imager scales
Vignetting (927 words) [view diff] no match in snippet view article find links to article
be cured by a reduction in aperture of 2–3 stops. (An increase in the F-number.) Unlike the previous types, natural vignetting (also known as natural
Lu Lin (footballer) (423 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 23 Youth career 2000–2002 Guangzhou F.C. Senior career* Years Team Apps†
Chang Feiya (283 words) [view diff] no match in snippet view article find links to article
0 in) Playing position Forward Club information Current team Guangzhou R&F Number 21 Youth career Guangdong Youth 2013 Guangzhou R&F Senior career* Years
F22 (239 words) [view diff] no match in snippet view article find links to article
Congo 1961-64 F-22P Zulfiquar class frigate of the Pakistan Navy f/22, the F-number measure of photographic lens' aperture size related to its focal length
Jiang Zhipeng (311 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 11 Youth career 2000–2005 Genbao Football Academy Senior career* Years
Wang Xiaolong (505 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 19 Youth career 2001–2004 Shandong Luneng Senior career* Years Team Apps†
Diffraction-limited system (1,637 words) [view diff] no match in snippet view article find links to article
instrument response function we may note that it is largely independent of the f-number of the lens. Thus at different f-numbers a camera may operate in three
Feng Zhuoyi (118 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 16 Youth career 2002–2008 Chengdu Blades Senior career* Years Team Apps†
Yu Yang (footballer) (396 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 3 Senior career* Years Team Apps† (Gls)† 2008–2014 Beijing Guoan 49 (1)
Scheimpflug principle (2,700 words) [view diff] no match in snippet view article find links to article
equation above, the values may be given equivalently by where N is the lens f-number and c is the circle of confusion. At a large focus distance (equivalent
Angular resolution (1,673 words) [view diff] no match in snippet view article find links to article
image sensor; this relates the spatial resolution of the image to the f-number, f/#: . Since this is the radius of the Airy disk, the resolution is better
Zhang Chenlong (399 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 26 Youth career Dongguan Nancheng 2013–2014 Guangzhou R&F Senior career*
Fu Yunlong (203 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 30 Youth career Renmin University High School Senior career* Years Team
Min Junlin (170 words) [view diff] no match in snippet view article find links to article
10 in) Playing position Forward Club information Current team Guangzhou R&F Number 35 Youth career Chengdu Blades Senior career* Years Team Apps† (Gls)†
Jin Yangyang (261 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 4 Senior career* Years Team Apps† (Gls)† 2011–2012 Dalian Shide 2 (0) 2013–2014
Dipstick (781 words) [view diff] no match in snippet view article find links to article
measurement system adopted in 1990 by the American Concrete Institute. F-Number measurement procedures were established by ASTM Standard E1155. The instrument
Zhang Yuan (footballer) (531 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 18 Youth career Renmin University High School Senior career* Years Team
SER F class (162 words) [view diff] no match in snippet view article find links to article
Railway → South Eastern and Chatham Railway → Southern Railway Class F Number in class 1 January 1923: 12 Withdrawn 1925–1930 Disposition All scrapped
F4 (385 words) [view diff] no match in snippet view article find links to article
boys appearing in Boys Over Flowers A function key on a computer keyboard F-number f/4, a standard expressing the diameter of the aperture on a camera F04:
Zhang Yaokun (448 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 5 Youth career 1997–1998 Dalian Yiteng Senior career* Years Team Apps†
Cassegrain antenna (1,275 words) [view diff] no match in snippet view article find links to article
required to hold the feed structure or secondary reflector. The focal ratio (f-number, the ratio of the focal length to the dish diameter) of typical parabolic
Index of motion picture terminology (543 words) [view diff] no match in snippet view article find links to article
shot - Extreme close-up - Extreme long shot - Eye-level camera angle F-number - F-stop - Fade-in - Fade-out - Fast cutting - Fast motion - Feature length
Tang Miao (footballer, born October 1990) (389 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 20 Youth career 2002-2010 Beijing Guoan Senior career* Years Team Apps†
Focal length (1,558 words) [view diff] no match in snippet view article find links to article
given angle of view, by a factor known as the crop factor. Depth of field f-number or focal ratio Dioptre Focus (optics) John E. Greivenkamp (2004). Field
Ye Chugui (427 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 13 Youth career 2004–2010 Dongguan Nancheng Senior career* Years Team Apps†
List of works by Vincent van Gogh (1,056 words) [view diff] no match in snippet view article find links to article
watercolor 1883 Private collection (No F number, JH Add. 21) Marshy Landscape 1883 Private collection (No F number, JH 394) Weaver Near an Open Window
Liu Dianzuo (437 words) [view diff] no match in snippet view article find links to article
Playing position Goalkeeper Club information Current team Guangzhou R&F Number 27 Youth career Dalian Yiteng Senior career* Years Team Apps† (Gls)† 2006–2010
Plzeň (3,054 words) [view diff] no match in snippet view article find links to article
(14 °F) and 165 days with an average temperature on or above 10.0 °C (50.0 °F). Number of days with maxima on or above 20.0 °C (68.0 °F) was 42. Plzeň is twinned
Cheng Yuelei (459 words) [view diff] no match in snippet view article find links to article
Playing position Goalkeeper Club information Current team Guangzhou R&F Number 1 Youth career 2001–2004 Sichuan Guancheng Senior career* Years Team Apps†
Aaron Samuel Olanare (487 words) [view diff] no match in snippet view article find links to article
2 1⁄2 in) Playing position Striker Club information Current team Guangzhou R&F Number 25 Senior career* Years Team Apps† (Gls)† 2010–2011 Shooting Stars 23 (15)
Fine-art photography (2,361 words) [view diff] no match in snippet view article find links to article
of field Depth of focus Exposure Exposure compensation Exposure value F-number Film format Film speed Focal length Guide number Hyperfocal distance Metering
Le Moulin de la Galette (Van Gogh series) (1,038 words) [view diff] no match in snippet view article find links to article
(F350) Street Scene in Montmartre 1887 Private collection (No F number, JH1240) Wallace, R (1969). Editors of Time-Life Books, ed. The World
Li Yan (footballer, born 1984) (558 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 33 Youth career Beijing Kuanli Guangzhou Songri Senior career* Years
Catadioptric system (1,703 words) [view diff] no match in snippet view article find links to article
adjustable diaphragm to control light transmission. This means the lens's F-number value is fixed to the overall designed focal ratio of the optical system
Degree of unsaturation (394 words) [view diff] no match in snippet view article find links to article
Hydrogen atoms in the compound c = number of Nitrogen atoms in the compound f = number of Halogen atoms in the compound For molecules containing only carbon
Li Yan (footballer, born 1984) (558 words) [view diff] no match in snippet view article find links to article
Playing position Midfielder Club information Current team Guangzhou R&F Number 33 Youth career Beijing Kuanli Guangzhou Songri Senior career* Years
Li Jianhua (footballer) (281 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 14 Senior career* Years Team Apps† (Gls)† 2002-2008 Shenzhen Shangqingyin
Catadioptric system (1,703 words) [view diff] no match in snippet view article find links to article
adjustable diaphragm to control light transmission. This means the lens's F-number value is fixed to the overall designed focal ratio of the optical system
Bokeh (1,826 words) [view diff] no match in snippet view article find links to article
a lens is stopped down smaller than its maximum aperture size (minimum f-number), out-of-focus points are blurred into the polygonal shape formed by the
Sigma 8–16mm f/4.5–5.6 DC HSM lens (1,745 words) [view diff] no match in snippet view article find links to article
per picture height (LW/PH), is most uniform at 8 mm (especially near the f-number of 8 where it is even throughout the image) with strong numbers at the
Simple eye in invertebrates (2,054 words) [view diff] no match in snippet view article find links to article
suitable for light-metering functions. Given the large aperture and low f-number of the lens, as well as high convergence ratios and synaptic gains, the
Nikon D3 (1,091 words) [view diff] no match in snippet view article find links to article
include times when the camera is operated at high shutter speed or high f number, where the lens' aperture is reduced to improve depth of field and sharpness
List of Johnson solids (256 words) [view diff] no match in snippet view article find links to article
Flattened (unfolded) image V – Number of Vertices E – Number of Edges FNumber of Faces (total) F3-F10 – Number of faces by side counts Norman W. Johnson
CGR class H1 (150 words) [view diff] no match in snippet view article find links to article
Operator(s) Udupussallawa railway and Kelani Valley Line Class H1 Power class F Number in class 1 Locale Ceylon First run 1930 Withdrawn 1972 Scrapped 1981
Jiang Ning (995 words) [view diff] no match in snippet view article find links to article
position Striker / Winger Club information Current team Guangzhou R&F Number 7 Youth career 1997–2003 Qingdao Jonoon Senior career* Years Team Apps†
Abderrazak Hamdallah (967 words) [view diff] no match in snippet view article find links to article
10 in) Playing position Striker Club information Current team Guangzhou R&F Number 9 Senior career* Years Team Apps† (Gls)† 2010–2013 Olympic Safi 55 (30)
Reciprocity (photography) (2,433 words) [view diff] no match in snippet view article find links to article
same effect. For example, an EV of 10 may be achieved with an aperture (f-number) of f/2.8 and a shutter speed of 1/125 s. The same exposure is achieved
Lee Jin-ho (119 words) [view diff] no match in snippet view article find links to article
Playing position Forward Club information Current team Real Madrid C.F. Number 8 Youth career 2000 Cruzeiro 2000-2002 Haksung High School Senior career*
Miguel Alfonso Herrero (807 words) [view diff] no match in snippet view article find links to article
position Attacking midfielder Club information Current team Guangzhou R&F Number 10 Youth career Burjassot Senior career* Years Team Apps† (Gls)† 2006–2007
Stratospheric Observatory for Infrared Astronomy (3,027 words) [view diff] no match in snippet view article find links to article
fuselage, the primary is shaped to an f-number as low as 1.3, while the resulting optical layout has an f-number of 19.7. A flat, tertiary, dichroic mirror
Li Zhe (footballer) (479 words) [view diff] no match in snippet view article find links to article
Playing position Defender Club information Current team Guangzhou R&F Number 37 Youth career Liaoning Youth Senior career* Years Team Apps† (Gls)†
Moritz von Rohr (420 words) [view diff] no match in snippet view article find links to article
entrance pupil location and diameter, without reference to focal length and f-number (see his 1904 and 1906 books). He says, "At this point it will be sufficient
F (disambiguation) (505 words) [view diff] no match in snippet view article find links to article
electric capacitance Faraday constant Fluorine Focal length of a lens f-number (sometimes called f-ratio, f-stop, or written f/), the focal length divided
Aperture value (30 words) [view diff] no match in snippet view article find links to article
(Additive System of Photographic Exposure) Aperture value mode (Av mode), an aperture priority mode on electronically controlled cameras Aperture F-number
Portrait photography (2,897 words) [view diff] no match in snippet view article find links to article
narrow field of view of 30 degrees, a focal length of 150mm, and a fast f-number in the f/3.3-3.7 range. Classic focal length is in the range 80–135mm
Dimensionless quantity (1,699 words) [view diff] no match in snippet view article find links to article
constant characterizing the strength of the electromagnetic interaction) f-number f optics, photography (ratio of focal length to diameter of aperture)
Thermographic camera (2,904 words) [view diff] no match in snippet view article find links to article
the greater sensitivity of cooled cameras also allow the use of higher F-number lenses, making high performance long focal length lenses both smaller and
Wen Chao (356 words) [view diff] no match in snippet view article find links to article
11 1⁄2 in) Playing position Forward Club information Current team Guangzhou R&F Number 48 Youth career Changsha Ginde Senior career* Years Team Apps† (Gls)†
Unit still photographer (989 words) [view diff] no match in snippet view article find links to article
closed around the camera as you can no longer access the cameras controls (F-number, shutter speed, ASA/ISO settings) or menu displays, directly. The LCD display
Webcam (3,552 words) [view diff] no match in snippet view article find links to article
greater for small image formats and is greater for lenses with a large f-number (small aperture), the systems used in webcams have a sufficiently large
Exposure (photography) (2,766 words) [view diff] no match in snippet view article find links to article
reciprocity (photography) Further information: aperture, exposure range and f-number An important principle of exposure is reciprocity. If one exposes the film
Spider anatomy (2,051 words) [view diff] no match in snippet view article find links to article
of view and gather available light very efficiently. The lenses have an F number of 0.58, which means they can concentrate available light more efficiently
Diffraction (4,451 words) [view diff] no match in snippet view article find links to article
to first null of where λ is the wavelength of the light and N is the f-number (focal length divided by diameter) of the imaging optics. In object space
Filter factor (235 words) [view diff] no match in snippet view article find links to article
Filter (photography) Filter (optics) Wratten number Exposure (photography) F-number Notes Further reading Hoya Corporation, Filters for imaging Cokin S.A
Montmartre (Van Gogh series) (2,001 words) [view diff] no match in snippet view article find links to article
(F347) Street Scene in Montmartre 1887 Private collection (No F number, JH1240) Montmatre's vegetable gardens, fenced in blocks for security
List of abbreviations in photography (693 words) [view diff] no match in snippet view article find links to article
system for indicating correct exposure in which the shutter speed and f-number are related arithmetically. EVF Electronic viewfinder. The through-the-lens
Digital versus film photography (4,062 words) [view diff] no match in snippet view article find links to article
correct) theorem. Depth of field, for a given lens focal length, at a given f-number will scale with sensor (film/chip) size. In effect, a smaller sensor will
William Eastman Palmer & Sons (978 words) [view diff] no match in snippet view article find links to article
of field Depth of focus Exposure Exposure compensation Exposure value F-number Film format Film speed Focal length Guide number Hyperfocal distance Metering
Macro photography (3,028 words) [view diff] no match in snippet view article find links to article
extremely small when focusing on close objects. A small aperture (high f-number) is often required to produce acceptable sharpness across a three-dimensional
Nikon F-mount (6,528 words) [view diff] no match in snippet view article find links to article
in specifications but not lens names. D — Distance. Indicated after the f-number in the name, and also occasionally designated AF-D. The lens electronically
Park Jong-woo (1,128 words) [view diff] no match in snippet view article find links to article
position Central midfielder Club information Current team Guangzhou R&F Number 8 Youth career 2008–2009 Yonsei University Senior career* Years Team Apps†
Autofocus (3,574 words) [view diff] no match in snippet view article find links to article
active with 'fast lenses' with certain geometrical apertures (typically F-number 2.8 and faster). Extended precision comes from the wider effective measurement
Index of optics articles (870 words) [view diff] no match in snippet view article find links to article
Eyeglass prescription Etalon Evanescent wave Excimer laser Eye Eyepiece f-number fabrication and testing (optical components) Faraday effect far point fata
Bridge camera (1,773 words) [view diff] no match in snippet view article find links to article
directly or by use of an adapter tube. Superzooms typically have a large f-number (aperture) especially at the long end, although several recent models offer
Secondary lens (567 words) [view diff] no match in snippet view article find links to article
length than the primary lens alone, and the same absolute aperture, so its f-number is increased accordingly. Some teleconverters are dedicated or matched
Wheat Fields (Van Gogh series) (7,594 words) [view diff] no match in snippet view article find links to article
Wheat Stacks with Reaper was made in June, 1888 (as indicated by the F number sequence) or June 1890 in Auvers as noted by the Toledo Museum of Art
Optical telescope (5,665 words) [view diff] no match in snippet view article find links to article
strongly, bringing them to a focus in a shorter distance. In astronomy, the f-number is commonly referred to as the focal ratio notated as . The focal ratio
Index of physics articles (F) (1,537 words) [view diff] no match in snippet view article find links to article
0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z F(R) gravity F-number F-term F-theory F. David Peat F. Dow Smith F. J. Duarte F. P. Schäfer F
Telecentric lens (949 words) [view diff] no match in snippet view article find links to article
heavier, and more expensive than normal lenses of similar focal length and f-number. This is partly due to the extra components needed to achieve telecentricity
Trip generation (1,046 words) [view diff] no match in snippet view article find links to article
estimates. In other cases, regressions, usually of the form trip rate = f(number of employees, floor area of establishment), are made for land use types
CN 6077 (349 words) [view diff] no match in snippet view article find links to article
heating Steam heat Career Operator(s) Canadian National Railways Class U-1-f Number(s) 6077 First run January, 1945 Retired 1960 Restored July 5, 1967 Current
Large Synoptic Survey Telescope (2,021 words) [view diff] no match in snippet view article find links to article
exceptionally short and stiff structure. This in turn implies a very small f-number, which requires very precise focusing of the camera. Allowing for maintenance
Binary logarithm (3,058 words) [view diff] no match in snippet view article find links to article
precisely, the exposure value of a photograph is defined as where is the f-number measuring the aperture of the lens during the exposure, and is the number
Rolleiflex (1,401 words) [view diff] no match in snippet view article find links to article
or with Rollei made levers on the shutter and a small shutter speed, f-number indicator window above the viewing lens. So in the first model of Pre-War
Lens (optics) (5,245 words) [view diff] no match in snippet view article find links to article
Back focal plane Bokeh Cardinal point (optics) Caustic (optics) Eyepiece F-number Gravitational lens Lens (anatomy) List of lens designs Numerical aperture
Lens (optics) (5,245 words) [view diff] no match in snippet view article find links to article
Back focal plane Bokeh Cardinal point (optics) Caustic (optics) Eyepiece F-number Gravitational lens Lens (anatomy) List of lens designs Numerical aperture
Liepāja (5,783 words) [view diff] no match in snippet view article find links to article
temperature: −33 °C (−27 °F) Absolute maximum of temperature: 34 °C (93 °F) Number of sunny days per year: 196 Average speed of wind: 5.8 m/s (13 mph) Average
Exmor (983 words) [view diff] no match in snippet view article find links to article
Model number Sensor Module size (WxDxH) AF actuator Lens composition F-number Focal length (35 mm conversion) Release date Utilizing devices IU134F9-Z
Canon EOS-1N (1,301 words) [view diff] no match in snippet view article find links to article
(DEP), an automatic mode that selects the focusing distance and aperture f-number to place the depth of field between two user-specified near and far points
Glossary of video terms (8,018 words) [view diff] no match in snippet view article find links to article
length to the diameter of the lens. The largest lens opening (smallest f-number) at which the lens can be set. A fast lens transmits more light and has
Canon SX280 HS (120 words) [view diff] no match in snippet view article find links to article
Tele-Converter Approx. 1.5x or 2.0x and Safety Zoom¹). Combined Approx. 80x Maximum f/number f/3.5 – f/6.8 Construction 12 elements in 10 groups (1 UD lens, 2 double-sided
CN U-1-f (222 words) [view diff] no match in snippet view article find links to article
heating Steam heat Career Operator(s) Canadian National Railways Class U-1-f Number(s) 6060–6079 Retired 1960 Preserved Three: 6060, 6069, 6077 Disposition
APEX system (1,946 words) [view diff] no match in snippet view article find links to article
given by the camera exposure equation where is the relative aperture (f-number) is the exposure time ("shutter speed") in seconds is the average scene
Miniature faking (2,110 words) [view diff] no match in snippet view article find links to article
distance, the DoF is given by T ≈ 2Nc (m + 1) / m 2, where N is the lens f-number, c is the circle of confusion, and m is the magnification (Ray 2000, 56)
Samuel Face (937 words) [view diff] no match in snippet view article find links to article
innovation in construction. Those innovations were Concrete Slab Flatness / F-Number System (1990) and The Lightning Switch Wireless Electric Switch (2006)
Color filter array (1,618 words) [view diff] no match in snippet view article find links to article
bibliographic items illustrating the importance of microlenses, their f-number, and the interplay with the CFA and CCD array. Further, a short discussion
Optics (12,141 words) [view diff] no match in snippet view article find links to article
daylight. A camera's aperture is measured by a unitless number called the f-number or f-stop, f/#, often notated as , and given by where is the focal length
List of Canon camcorders (3,890 words) [view diff] no match in snippet view article find links to article
and more feedback telling the user exactly what focal range, aperture f-number and zoom number the lens is set to. The lens thread supports 72 mm filters
Transformer (10,400 words) [view diff] no match in snippet view article find links to article
between its rms voltage Erms of the winding, and the supply frequency f, number of turns N, core cross-sectional area a in m2 and peak magnetic flux density
Index of motion picture-related articles (1,833 words) [view diff] no match in snippet view article find links to article
distance -- Flashing arrow -- Flatbed editor -- Flicker fusion threshold -- F-number -- Focal length -- Focus (optics) -- Focus puller -- Focusing screen --
William Mason (locomotive) (785 words) [view diff] no match in snippet view article find links to article
225 lbf (27.69 kN) Career Operator(s) Baltimore and Ohio Railroad Class F Number(s) 25(second), renumbered 55 in 1882 Official name William Mason First
Axis Communications (3,020 words) [view diff] no match in snippet view article find links to article
adjusting the iris position. This position, also referred to as a specific f-number, is where the lens works best and optical errors are reduced. P-Iris was
Harbour (software) (3,035 words) [view diff] no match in snippet view article find links to article
NIL String: "hello", 'hello', [hello] Date: 0d20100405 Logical: .T., .F. Number: 1, 1.1, −1, 0xFF Complex Types may also be represent as literal values:
Oversampled binary image sensor (1,352 words) [view diff] no match in snippet view article find links to article
can be computed as where is the wavelength of the light and is the F-number of the optical system. Due to the lowpass (smoothing) nature of the PSF
XHarbour (2,061 words) [view diff] no match in snippet view article find links to article
'hello', [hello], or E"hello\n" Date: ctod("2005-03-17" ) Logical: .T., .F. Number: 1, 1.1, -1, 0xFF Complex Types may also be represent as literal values:
Frederick Christian Palmer (2,610 words) [view diff] no match in snippet view article find links to article
of field Depth of focus Exposure Exposure compensation Exposure value F-number Film format Film speed Focal length Guide number Hyperfocal distance Metering
List of superzoom compact cameras (377 words) [view diff] no match in snippet view article find links to article
Compact Camera Brand Model Optical zoom Range, eq 35mm film (mm) Sensor f-number (aperture) Video Method of stabilization Burst Speed Mode RAW Hot shoe
List of uniform polyhedra by Wythoff symbol (292 words) [view diff] no match in snippet view article find links to article
Image Name Bowers pet name V Number of vertices,E Number of edges,F Number of faces=Face configuration ?=Euler characteristic, group=Symmetry group
List of uniform polyhedra by spherical triangle (132 words) [view diff] no match in snippet view article find links to article
Image Name Bowers pet name V Number of vertices,E Number of edges,F Number of faces=Face configuration ?=Euler characteristic, group=Symmetry group
NK Maribor in European football (4,435 words) [view diff] no match in snippet view article find links to article
matches against Serbian clubs, who represented Serbia and Montenegro. F Number of seasons the player was part of the club. Season counts if a player has
Flory-Stockmayer Theory (654 words) [view diff] no match in snippet view article find links to article
Flory-Stockmayer Theory predicts the gel point using the following definitions f = number of reactive functional groups on a branch unit (i.e. the functionality
List of bridge cameras (727 words) [view diff] no match in snippet view article find links to article
Bridge Camera Brand Model Optical Zoom Range, eq 35mm film (mm) Sensor f-number (aperture) Video Method of Stabilization Burst Speed Mode RAW Hot Shoe
Edward P. Ney (6,732 words) [view diff] no match in snippet view article find links to article
system. Consequently, Ney and Huch developed reliable cameras whose low F-number enhanced their ability to record dim light, but sacrificed picture sharpness