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1、Theshutterspeedisthetimethatthelightisprojectedontothefilm・Themostsatisfyingexposureisachievedonlyifthetwoaresetproperly.Unfortunately,manyphotographersaredistressedbythefactthattheyareunabletoachievesatisfactoryresults・Thereasonissimple:theyalwaysuseacompletelydi
2、fferentmethodtosettheapertureandshutterspeed,andtheresultsarecertainlynotsatisfactory.Let'sstartbylookingathowtoselecttheappropriateaperturevalue.Choosedifferentaperturevalues,allowinglighttopassthroughtheapertureofthelens・Thelargertheaperture,themorelightthatpass
3、es,andtheless・Whenyousettheaperturevaluetomaximum,thevalueoftheaperturevalueisminimized.Andwhenyouclosethelensorzoomout,thecorrespondingnumbergetsbiggerandbigger・Andthatmakesalotofpeopleuncomfortable,whythelargertheaperture,thesmallerthenumber;Thesmallerthenumber,
4、thelargertheaperture.ThemagnitudeoftheFisnotthesizeoftheentireaperture,it'sjustpartofit.Forexample,theapertureofthef-8isactuallylargerthan8.Infact,it'seasytorememberwhenyouaccepttheidea:thelargerthenumber,thesmallertheaperture・Thesmallerthenumber,thelargertheapert
5、ure・ThebestcombinationofapertureandshutterspeedAbouttheshutterspeedcontrolandchoice,saidpopularpoint,shuttershadeinfrontofthefilmistheequivalentofacurtain,accordingtothesizeofthecurtainopenedtodeterminethelightintensityontheprojectedonthefilm,thesizecontroltocontr
6、olisknownastheshutterspeedintime・TheshutterspeedisthesameastheapertureF,whichmeansonlypartialparameters,15for1/15seconds,and30for1/30seconds,twiceasfastas1/15seconds・Correspondingly,60represents1/60seconds.Ataslowershutterspeed,thefirstcurtainindicatestheshuttersp
7、eed,whilethesecondcurtainallowstheshutterspeedtobeclosed.Butatafasterrate(like1/125ofasecondormore),thecurtainmovestogether,allowingasmalllighttobeprojectedfromoneendofthefilmtotheother・Thefastertheshutterspeed,thenarrowerthecrackthatallowslighttoenter,thelessligh
8、tthatisprojectedontothefilm・Onsomeofthecamera,theshuttercurtaindesignforverticalmovement,buttheprincipleisthesameTherecouldbemanyreaderswillhavesuchaque
