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1、DepthofFieldCalculator窗体顶端Camera,filmformat,orcircleofconfusionFocal length (mm)Selected f-stopSubject distanceCalculate窗体底端Subject distance 10 ft Depth of field Near limit 7.69 ftFar limit 14.3 ftTotal 6.61 ft In front of subject 2.31 ft(35%)Behind subject 4.3 ft(65%) Hyperfocal di
2、stance 32.8 ftCircle of confusion 0.019mmUsetheactualfocallengthofthelensfordepthoffieldcalculations.Thecalculatorwillautomaticallyadjustforany"focallengthmultiplier"or"fieldofviewcrop"fortheselectedcamera.Focallengthsofdigitalcameralensesarelistedhere.Focus at the subject distance,
3、 10 ft 6.61 ft7.69 ft 14.3 ft Focusatthehyperfocaldistance,32.8 ft Depth of field extends from 16.4 ft to infinityDepthofFieldDefinitionHyperfocal,near,andfardistancesarecalculatedusingtheseequations.Circlesofconfusionfordigitalcamerasarelistedhere.DepthofField:Thezone,orrangeofdis
4、tances,withinascenethatwillrecordassharp...Itisoneofthemostcreativeandprofoundeffectsavailabletophotographers.UsingYourDigitalCamera,GeorgeSchaub,2003Imageclarityorsharpnessisnotjustamatteroffocusingalensonthesubject.Thereisanareainfrontofandbehindthesharpfocusplanethatisalsosharpor
5、clear,andtheextentofthisareachanges,dependingonthefocallengthofthelens,thefocusingdistance,andtheapertureused.Thisthree-dimensionalareaofsharpfocusiscalleddepthoffield.LonelyPlanetLandscapePhotography:AGuidetoTakingBetterPictures,PeterEastway,2005.HyperfocalDistanceDefinition...theh
6、yperfocaldistancesetting...issimplyafancytermthatmeansthedistancesettingatanyaperturethatproducesthegreatestdepthoffield.HowtoUseYourCamera,NewYorkInstituteofPhotography,2000.Whenthelensisfocusedonthehyperfocaldistance,thedepthoffieldextendsfromhalfthehyperfocaldistancetoinfinity.Ph
7、otography,PhilDavis,1972.
