powers of the square root of 2: f/1, f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11, f/16, f/22, f/32, f/45, f/64, f/90, f/128, etc. Each element in the sequence...

The f-number is the ratio of the lens's focal length to the diameter of the entrance pupil. F-number or F number also may refer to: F number (chemistry)...

by the f-number, written f/N, where N is the f-number given by the ratio of the focal length f to the diameter of the entrance pupil D: N = f D . {\displaystyle...

f-number. Accordingly, as illustrated at right, a guide number can be factored to a small f-number times a long distance just as readily as a large f-number...

F number is a correlation number used in the analysis of polycyclic aromatic hydrocarbons (PAHs) as a descriptor of their hydrophobicity and molecular...

A large number of variants of the General Dynamics F-16 Fighting Falcon have been produced by General Dynamics, Lockheed Martin, and various licensed manufacturers...

(using round numbers) f/2 – f/4, f/4 – f/8, and f/8 – f/16 or (for a slower lens) f/2.8 – f/5.6, f/5.6 – f/11, and f/11 – f/22. These are not sharp divisions...

A number is a mathematical object used to count, measure, and label. The most basic examples are the natural numbers 1, 2, 3, 4, and so forth. Numbers...

c f 2 {\displaystyle {\text{DOF}}\approx {\frac {2u^{2}Nc}{f^{2}}}} for a given maximum acceptable circle of confusion c, focal length f, f-number N,...

analysis of binary classification and information retrieval systems, the F-score or F-measure is a measure of predictive performance. It is calculated from...

shutter and film winding mechanisms. As a result of the enormous increase in f-number, to maintain similar exposure times, the photographer must use a fast film...

photography, exposure value (EV) is a number that represents a combination of a camera's shutter speed and f-number, such that all combinations that yield...

The Lockheed Martin F-35 Lightning II is an American family of single-seat, single-engine, supersonic stealth strike fighters. A multirole combat aircraft...

defined number N = F 7 ( 12 ) = F ( F ( F ( F ( F ( F ( F ( 12 ) ) ) ) ) ) ) , {\displaystyle N=F^{7}(12)=F(F(F(F(F(F(F(12))))))),} where F ( n ) = 2...

we find x = 1.22 λ f d , {\displaystyle x=1.22\,{\frac {\lambda \,f}{d}},} but f d {\displaystyle {\frac {f}{d}}} is the f-number of a lens. A typical...

surface ocean f-number, f-ratio, or focal ratio, the ratio of the focal length of an optical system to the diameter of its entrance pupil F-number (disambiguation)...

events. F with diacritics: Ƒ ƒ Ḟ ḟ ᵮ ᶂ Ꞙ ꞙ : F with stroke is used in the Anthropos phonetic transcription system and older Ewe writing ꬵ : Lenis F is used...

subject in direct sunlight." In simplest terms, bright sun = f:16 @ 1/film-speed-number (aperture and shutter speed, respectively). For example: On a...

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...

heavier-duty F-250 through F-450 pickups, F-450/F-550 chassis cabs, and F-600/F-650/F-750 Class 6–8 commercial trucks. The F-Series was introduced in 1948 as a...

ordered 25 F-15IA fighters based on the F-15EX and plans to upgrade 25 F-15Is to the F-15IA standard as of 2023. In 2024, the number of new-built F-15IAs was...

"Axel F" is an electronic instrumental track by German musician Harold Faltermeyer. The track served as the theme tune to the film Beverly Hills Cop,...

F4, F.IV, F04, F 4, F.4 or F-4 may refer to: Flanders F.4, a 1910s British experimental military two-seat monoplane aircraft Martinsyde F.4 Buzzard, a...

free(f); return NULL; } f->number = ++seq; f->next = fruit_list; fruit_list = f; return f; } void print_fruit_list(FILE *file) { struct fruit *f; for (f =...

The McDonnell Douglas F/A-18 Hornet is an all-weather supersonic, twin-engine, carrier-capable, multirole combat aircraft, designed as both a fighter...

PoF, the angle between the planes that define the near and far limits of DoF (i.e., the angular DoF) increases with lens f-number; for a given f-number...

Look up F or f in Wiktionary, the free dictionary. F is the sixth letter of the Latin alphabet. F may also refer to: F or f, the number 15 in hexadecimal...

closing of the diaphragm aperture. The f-number (also called the 'relative aperture'), N, is defined by N = f / EN, where f is the focal length and EN is the...

The following is a list of colors. A number of the color swatches below are taken from domain-specific naming schemes such as X11 or HTML4. RGB values...

number, numeral and digit. It is the natural number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number,...