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1、摄影基础1光圈和快门怎么用Novice:howdoyouplaywiththeapertureshutterontheDC?[2007-05-02]Chinesephotoeditor:anselTheapertureandshutterThelargertheaperture,themorelightispassedintheunittime,andtheless・Thegeneralrepresentationofapertureistheletter〃F+value",suchasF5.6,F4,etc・Notehereisthesma
2、llerthevalue,saidthelargertheaperture,suchasF4isbiggerthanF5・6aperture,andthedifferencebetweenthetwoadjacentaperturetwice,thatistosaytheF4isbiggerthanwhatF5.6throughlighttwice・Thedefinitionoftheshutterisrelativelysimple,alsoisthetimetoallowlightpassingthroughanaperture,said
3、that，sthewaythenumerical,1/30,1/60ofasecond,andsoon,forexample,thesamealsodifferstwicebetweentwoadjacenttheshutter・Thecombinationofapertureandshutteristheamountofexposurethatisnotuniquewhenexposureiscertain.SuchasthecurrentmeasurednormalexposuretoF5・6and1/30ofasecond,ifthea
4、pertureincreaselevel,thatis,F4,soatthistimeoftheshuttervalueswillbe1/60,thiscombinationcanalsoachievethenormalexposure・Differentcombinationsmayachievethesameamountofexposure,buttheimagesproducedarenotthesame・Hereinvolvestheconceptof"depth",calledthedepthoffieldiswhenthecame
5、rafocusonyoursubject,yoursubjectandscopeofbeforeandaftertheseenehasaclear,thisrangeiscalledthedepthoffield・Wecanlookatthecomparisonbetweenthetwoimagesinfigure1andfigure2.AperturepriorityorshutterpriorityWiththebasicconceptsofaperture,shutteranddepthoffield,itisnotdifficultt
6、ouseapertureorshutterspeed・Aperturepriorityistomanuallydefinetheaperturesizeandthenusethecamera，slighttoobtainthecorrespondingshuttervalue・Becausethesizeoftheaperturedirectlyaffectsthedepthofthefield,thispatternisthemostwidelyusedinnormalshooting・Inphotographingpeople,wegen
7、erallyusethelargeaperturefocallengthtoachievetheeffectofshallowdepthoffield,whichcanhighlightthemainbody.Atthesametime,thelargeaperturecanalsoobtainthefastshuttervalue,thusimprovingthestabilityofthehandheldphotography.WhenshootingIandscapesthatkindofphotos,wetendtousesmalle
8、raperture,sothatthedepthoffieldrangeiswide,canmakethedistanceandthenearbylandscape
