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)...

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

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...

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...

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...

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...

(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...

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...

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)...

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...

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

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...

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...

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...

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

The Boeing F-47 is a planned American air superiority sixth-generation fighter aircraft under development by Boeing for the United States Air Force (USAF)...

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...

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...

"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,...

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

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,...

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...

Q_rsqrt(float number) { union { float f; uint32_t i; } conv = { .f = number }; conv.i = 0x5f3759df - (conv.i >> 1); conv.f *= 1.5F - (number * 0.5F * conv.f * conv...

diameter, or minimum f-number, of a photographic lens. A lens with a larger than average maximum aperture (that is, a smaller minimum f-number) is called a "fast...

The General Dynamics F-16 Fighting Falcon is an American single-engine supersonic multirole fighter aircraft originally developed by General Dynamics...

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 first introduced in 1948...