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 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...

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,...

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...

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...

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

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...

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...

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)...

supplement the F-22 with an advanced Eagle variant, the F-15EX, in order to retain an adequate number of air superiority fighters. The F-15 remains in...

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...

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...

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...

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)...

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...

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

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...

number, named after John Milnor, is an invariant of a function germ. If f is a complex-valued holomorphic function germ then the Milnor number of f,...

"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,...

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...

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...

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...

}^{b}f(b')\,db'} Note that 0 = F ( − ∞ ) ≤ F ( b ) ≤ F ( ∞ ) = 1 {\displaystyle 0=F(-\infty )\leq F(b)\leq F(\infty )=1} . Using a random number c from...