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...

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...

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

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...

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,...

shutter and film winding mechanisms. As a result of the enormous increase in f-number, while maintaining the same exposure time, one must use a fast film in...

(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...

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...

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...

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)...

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...

minor is F-sharp minor. Its direct enharmonic, G-flat major, contains the same number of flats in its key signature. The scale degree chords of F-sharp major...

changed as long as the f-number is altered to compensate, e.g. ⁠1/250⁠ second at f/11 gives equivalent exposure to ⁠1/125⁠ second at f/16. More in general...

= number whose sum of even digits and sum of odd digits are even 1044 = sum of distinct powers of 4 1045 = octagonal number 1046 = coefficient of f(q)...

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 =...

F m F n + F m − 1 F n − 1 = F m + n − 1 , F m F n + 1 + F m − 1 F n = F m + n . {\displaystyle {\begin{aligned}{F_{m}}{F_{n}}+{F_{m-1}}{F_{n-1}}&=F_{m+n-1}...

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...

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...

"Axel F" is an electronic instrumental track by German musician Harold Faltermeyer. It served as the theme song for the 1984 film Beverly Hills Cop, its...

Achilles number smallest four digit eban number the sum of all the nban numbers in the sequence 2001 – sphenic number 2002 – palindromic number in decimal...

24 mm f/2.0 24 mm f/2.8 28 mm f/2.0 28 mm f/2.8 28 mm f/3.5 35 mm f/1.4 35 mm f/2.0 35 mm f/2.8 45 mm f/2.8 GN 45 mm f/2.8 P 50 mm f/1.2 50 mm f/1.4 50 mm...

same focal length as a single 2.5-dioptre lens. Depth of field Dioptre f-number or focal ratio Wikimedia Commons has media related to Focal length. Grievenkamp...

\over S_{2}}{f \over S_{1}-f}\,.} This can optionally be expressed in terms of the f-number N = f/A as: c = | S 2 − S 1 | S 2 f 2 N ( S 1 − f ) . {\displaystyle...

and vertical lines in the number spiral correspond to polynomials of the form f ( n ) = 4 n 2 + b n + c {\displaystyle f(n)=4n^{2}+bn+c} where b and...

the root)}}} T 2 = ∑ F (number of links traversed where the buckets are different) {\displaystyle T_{2}=\sum _{F}{\text{(number of links traversed where...

it kept the basic F-84 number. Production delays on the F-84F resulted in another order of the straight-wing version; this was the F-84G. In 1944, Republic...