Photography_for_Beginers.pdf

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1、DIGITALPHOTOGRAPHYBASICSFORBEGINNERSbyRobertBerdanrberdan@scienceandart.orgwww.canadiannaturephotographer.comThesenotesarefreetousebyanyonelearningorteachingphotography.1.Choosingacamera-thereare2maintypesofcompactcamerasA)PointandShootCamera(somehave

2、interchangeablelensesmostdon't)-youviewthesceneonaliquidcrystaldisplay(LCD)screen,somecamerasalsoofferviewfinders.B)SingleLensReflex(SLR)-cameraswithinterchangeablelensesletyouseetheimagethroughthelensthatisattachedtothecamera.Whatyouseeiswhatyouget-t

3、hisfeatureisparticularlyvaluablewhenyouwanttousedifferenttypesoflenses.DigitalSLRCamerawithInterchangeablezoomlens1Pointandshootcamerasaresmall,lightweightandcanbecarriedinapocket.ThesecamerastendtobecheaperthenSLRcameras.Manyofthesecamerasofferabuilt

4、inmacromodeallowingextremeclose-uppictures.GenerallythequalityoftheimagesoncompactcamerasisnotasgoodasthatfromSLRcameras,buttheyarecapableoftakingprofessionalqualityimages.SLRcamerasarebiggerandusuallymoreexpensive.SLRscanbeusedwithawidevarietyofinter

5、changeablelensessuchastelephotolensesandmacrolenses.SLRcamerasofferexcellentimagequality,lotsoffeaturesandaccessories(somemightarguetoomanyfeatures).SLRcamerasalsoshootahigherframeratesthencompactcamerasmakingthembetterforactionphotography.Theirdisadv

6、antagesinclude:highercost,largersizeandweight.TheyarecalledSingleLensReflex,becauseyouseethroughthelensattachedtothecamera,thelightisreflectedbyamirrorthroughaprismandthentheviewfinder.Themirrorispulledaway(reflex)whentheuserpushesthebuttontotakeapict

7、ureandallowslighttohitthesensorbehindthemirror.ImportantCameracontrols:1.ISOSpeed-determinesthedigitalsensorssensitivitytolightandtheamountof"grain"inyourpictures.Whenthereislotsoflighte.g.sunnyday,setyourcameraISOspeedto100-200.Ifyouwanttoshootinside

8、withoutusingaflash,thensetyourcameratoISO400,800,1600orhigher.ThehighertheISOspeedthegrainieryourimagewillbe.AlwaystryusethelowestISOspeedthatallowsyoutoshootwithashutterspeedof130orfasterifyouarenotusingatripod.DoublingtheISOspeede.g.from100