Exposure Value (ev) and Exposure Compensation

Exposure is defined as how much light hits the camera's sensor. It depends on the camera settings mainly aperture and shutter speed. Exposure value (known ...  TravelHealthMedicalCarsTechnologyHomeFamilyBusinessInterestWoman Editorials»HobbiesandInterests»Photography»ExposureValue(ev)andExposureCompensationBy:ZivHaparnasExposureisdefinedashowmuchlighthitsthecamera'ssensor.Itdependsonthecamerasettingsmainlyapertureandshutterspeed.Exposurevalue(knownasEV)isanumberthatrepresentstheexposuresettingofthecamera.Wewillexplainwhatthenumbermeansandhowitisusedforexposurecompensation.Theexposuredependsontwothings:howmuchlightgetsthroughthelensestothecamera'ssensorandforhowlongthesensorisexposed.Theformerisafunctionoftheaperturevaluewhilethelatterisafunctionoftheshutterspeed.Exposurevalueisanumberthatrepresentsthispotentialamountoflightthatcouldhitthesensor.Itisimportanttounderstandthatexposurevalueisameasureofhowexposedthesensoristolightandnotameasureofhowmuchlightactuallyhitsthesensor.Theexposurevalueisindependentofhowlitthesceneis.Forexampleapairofaperturevalueandshutterspeedrepresentsthesameexposurevaluebothifthecameraisusedduringaverybrightdayorduringadarknight.Eachexposurevaluenumberrepresentsallthepossibleshutterandaperturesettingsthatresultinthesameexposure.Althoughtheexposurevalueisthesamefordifferentcombinationsofaperturevaluesandshutterspeedstheresultingphotocanbeverydifferent(theaperturecontrolsthedepthoffieldwhileshutterspeedcontrolshowmuchmotioniscaptured)EV0.0isdefinedastheexposurewhensettingtheaperturetof-number1.0andtheshutterspeedto1second.Allotherexposurevaluesarerelativetothatnumber.Exposurevaluesareonabasetwologarithmicscale.ThismeansthateverysinglestepofEV-plusorminus1-representstheexposure(actuallightthathitsthesensor)beinghalvedordoubled.Itisnotlikelythatyouwillfindyourselfsettingabsoluteexposurevalues.Mostcamerasdonotsupportenteringexposurevaluesatall.Youwillhoweveruseexposurevalueswhensettingexposurecompensation.Exposurecompensationisawaytosetthecameratoanexposurethatislowerorhigherthanwhatwasautomaticallydetected.Thecameraautoexposuresettingisnotperfectandinsomescenesresultsinoverorunderexposedphotos.InsuchcasesexposurecompensationcansolvetheproblemExposurecompensationisalsousefulwhenyouliketogetphotosthatareabitoverorunderexposed.Whensettingexposurecompensationyouselectanexposurevaluethatisaddedtothecurrentexposuresetting.Usuallyexposurecompensationvaluesarenomorethan+/-5EV.Forexampleacompensationof-2EVwillmakeaphotodarker(orlessexposed)whileacompensationof+2EVwillmakeitbrighter(ormoreexposed).Agoodexampleofusingexposurecompensationisonabrightday.Compensatetolowerexposureusingavalueof-0.5EVor-1EVtogetrichercolorsandmoredetails.Exposurevaluescanalsobeusedinconjunctionwithautobracketing.Whenusingexposureautobracketingeachtimeyoutakeaphotothecameratakesaseriesofextraphotosforyoueachwithaslightlydifferentexposure.YoucansettheEVstepbetweeneachphoto.Photography • TipstoBuyingaDigitalCamera • TheArtofDigitalPhotographyLighting • GettingStartedinDigitalPhotography • HelpMe,ICantSeeAnythingUsingMySLR! • TheDifferenceBetweenFilmandDigitalPhotography • FlashAbovetheRest:CanonSpeedlite430ex • DigitalCamerasinTodaysSociety • CameraCanonDigitalSd500Features • CanonCameraDigitalPowershotS2 • DigitalPhotography,IsItRightForYou? • DigitalPhotographyOnCanvas • CREATINGPRINTABLEPHOTOGREETINGCARDS • HowtoCropYourPhotosProperly • AReviewofCheapDigitalCameras • ChoicesforDigitalCameras • TheBenefitsOfADigitalCameraOverAFilmCamera • InfraredCameraApplications-HowManyDoYouKnow? • ThisisyourLifePhotoAlbum • ArcsoftPhotoStudio5.5-InputFileSizeLimitations • DigitalPhotos»MoreonMostPopularPhotographyArticles MostSearchOnPhotography» matteorglossyphotosMostPopularPhotographyMatteorGlossyPhotos?PrintingOnMatteOrGlossyDigitalPhotoPrintingPaperLanguagesWhatisTranslation?LeadershipWhatisaSharedVision?LifeFearandAttitudeWhyDoYouNeedMotivationInLife?MartialArtsTipsForTheBeginnerInJudoModelToysTheProsandConsofGasRCPlanesMotivationTheTop10DailyMindDisciplinePracticesMusicSoloOverChordsWithTheMinorPentatonicScalePhoenixUniversityAdvantagesandDisadvantagesofOnlineEducationPoetryICarryyourHeartWithMe,AboutthePoembyE.E.CummingsTopSearcheson=?>• DigitalCameraPhotoPrinting• WhatDigitalCameraPhotography • TipstoBuyingaDigitalCamera • TheArtofDigitalPhotographyLighting • GettingStartedinDigitalPhotography • HelpMe,ICantSeeAnythingUsingMySLR! • TheDifferenceBetweenFilmandDigitalPhotography • FlashAbovetheRest:CanonSpeedlite430ex • DigitalCamerasinTodaysSociety • CameraCanonDigitalSd500Features • CanonCameraDigitalPowershotS2 • DigitalPhotography,IsItRightForYou? • DigitalPhotographyOnCanvas • CREATINGPRINTABLEPHOTOGREETINGCARDS • HowtoCropYourPhotosProperly • AReviewofCheapDigitalCameras • ChoicesforDigitalCameras • TheBenefitsOfADigitalCameraOverAFilmCamera • InfraredCameraApplications-HowManyDoYouKnow? • ThisisyourLifePhotoAlbum • ArcsoftPhotoStudio5.5-InputFileSizeLimitations • DigitalPhotos»MoreonPhotography EditorialsMainpage-MostReadEditorials-SubmitArticleStreetdirectory.comPhotographyGuideisacomprehensivecompilationofdigitalphotographyinformation(photographyarticles,photographytutorial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