F

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AcronymDefinition
FFull
FFax
FFemale
FFailure
FFalse
FFail
FFighter (US military aircraft designation; as in F-16)
FFahrenheit
FIf
FFound
FFirst (class airfare)
FFast (logic integrated circuits)
FFront
FField
FFine
FFord Motor Company (stock symbol)
FFriend(s)
FForce
FFlash (Precedence Level)
FFrance (International Auto Identification)
FRegistration (Scott Catalogue prefix; philately)
FForward
FFine (numismatics; 10th best condition of coin)
FFine (book condition)
FFunction
FFrankfurt (German auto license plates)
FFixed
FFilter
FFlag
FFellow
FFlat (welding position)
FFog (weather teports)
FFrequency
FFuse
FFault
FForte (music)
FFocal length (photography)
FFailing Grade
FFraction
FFloat (C programming language)
FFoul (baseball)
FFable (video game)
FFelony
FFolio
FFrancs
FFiduciary (IRB)
FFlight Inspection
FFujita (tornado intensity scale, ranging from F1 to F5)
FFoxtrot
FFluorine
FFleer (baseball card manufacturer)
FPhenylalanine (amino acid)
FBioavailability (fraction of drug reaching systemic circulation)
FFarad
FFuze
FFlunked
FFlunk
FFishing Mortality (fisheries population dynamics)
FFemto- (10^-15, SI Prefix)
FFunctor (abstract algebra)
FFroude Number
FFaraday Constant
FFunctional Distribution
FFilial Generation (genetics)
FFlare Patterns (US DoD)
FFairchild Aircraft Limited (manufacturer's symbol; Canada)
FFsmart (China)
FFrequency of Lifting
FFederal Reserve Bank of Atlanta, Georgia (designates original point of circulation of a dollar bill)
FFisher's F Ratio (statistics; usually written in italics)
FF Sub-Shell (fourth outer subshell of an electron shell)
FCleared to Fix
FUndenominated United States Stamp (29 cents, introduced 3 Feb 1991)
FAt City Shop for Repairs (Alabama Public Safety Radio Code)
References in periodicals archive ?
Admittedly, this isn't exactly comparing like with like, and a 24-70mm zoom gives considerably more compositional and creative options than the fixed focal length 50mm, but with those wider angles comes other considerations, most notably distortion.
I think that having to experience shooting with one focal length helped me understand framing one at a time.
The problem is that such short focal lengths tend to offer poor eye relief, the distance from the outer surface of the eyepiece's eye lens within which you can view the full viewing angle.
The UA18x5.5 weighs 2.04kg and covers focal lengths from 5.5mm on the wide-angle end to 100mm on the telephoto end, making it useful for mobile situations that require added mobility--news reporting and on-location productions, for instance.
A higher focal length, such as 200mm, is known as telephoto.
This sounds a lot easier than it is, especially if the scope has a long focal length, with the resulting narrow field of view.
For example, a 32 wavelength wide lens aperture would have a nominal focal length of 20 [Lambda], so a normalized path length error of 0.005 would correspond to 0.1 [Lambda], or 36 [degrees] of phase error.
The rugged 2/3-inch series is now available in seven focal lengths from 5mm to 50mm.
Now, before you rush out to buy a 24mm f/3.5 wide-angle lens, thinking that this will be closest to your own vision, consider this: the measured focal length of the eye isn't what determines the angle of view of human vision!
Each focal length has its own individual optical design with the use of special types of glass displaying anomalous partial dispersion.
To maximize performance, Nikon designers set the focal length of the tube lens for the infinity system at 200 mm and chose 60 mm as the parfocal length of the objective.
these are the 4 main optical mounts, including all accessories - a large aperture mirror (reflector) for observing weak objects in a remote universe; medium sized diameter lenses (refractor) with corrected color defect and longer focal length for observation of planets, moon and sun in integral light; wide diameter telescope for observing angularly larger objects; a special solar telescope of a larger diameter observing the balmer a spectral line for observing detailed phenomena in the solar atmosphere.