JosephA.EuloFall2015Prof.ShariKesslerVisualStorytelling

Quiz:TheBasics1. Whatexactlydowemeanbyexposure?

Exposureistheamountandqualityoflightthatreachesthephotographicfilmordigitalsensor.Exposureisdeterminedbyshutterspeed,lensaperture,ISOandqualityoflight.

2. Howdoesalightmetermeasurewhatisa'normal'exposure,underexposure?

overexposure?Lightmetersmeasuretheamountoflightinyourshot.(twokindsoflightreadingsReflectiveandIncident.(Somelightmeterstakebothkindsofreadings)lightmeters,willtellyouwhatyourApertureshouldbeinrelationtoISO,andshutterspeed,andviceversa.Ifyouhavealeastthreeofthefourvariablesofexposurethenyoucanfindthefourthvariable.Forexample.IfIamshootingwithandISOof800,at60thofasec(ShutterSpeed)thenalightmeterwilltellmewhatapertureIneedtosetinordertogetanormalexposer.

3. HowisISOrelatedtothesubjectbeforethelens?Howdoyouchooseacorrect

ISOforasubject?ISOisthesensitivityoftheFilm/Sensortolight.ThehighertheISOnumberthemoresensitiveandviceversa.

4. Whatarethe4basicvariablesofexposure?

1)Light,2)Aperture(measureinstops,controlsdepth),3)Sensitivity(ISO/ASA),4)Time(shutterspeed).

5. Howareapertureandshutterspeedrelatedwhenspeakingaboutexposure?

Aperture(similartothepupiloftheeye)controlsthequantityoflightthatpassesthroughthelens,andShutterspeedcontrolshowlong(time)thesensor/filmisexposedtolight.Thecombinationdeterminesthedepthoffield.

6. Whatarethecreativecontrolsyouhaveasaphotographerintermsofcameraand

lens?Lenschoice,andmanipulationofthe4basicexposurevariablesprovidesyouwithalotofcreativecontroloverhowyouframeandexposeyourshot.