Fotograferingsbegrepp

Hur bländarinställning, slutarhastighet och ISO-känslighet kontrollerar exponeringen

Inställning för bländare, slutarhastighet och ISO-känslighet har ett nära samband inom fotografering. Bländarinställningen kontrollerar öppningen som reglerar ljuset som går in i kameran, medan slutarhastigheten bestämmer tiden som ljuset släpps in. ISO-känslighet avgör hastigheten som kameran reagerar på ljus. Tillsammans beskrivs dessa tre aspekter

Slutarhastighet

Inställningar

Resultat

Snabb hastighet = mindre ljus Långsam hastighet = mer ljus

som exponeringstriangeln.

En förändring av slutarhastighet, bländarvärde eller ISO-känslighet kan kompenseras genom justeringar av de andra för att behålla rätt ljusmängd. Resultaten ändras emellertid enligt inställningarna. Till exempel används slutarhastigheten för att uttrycka rörelse, bländaren kan kontrollera skärpedjupet och ISO-känsligheten kan kontrollera fotots kornighet.

ISO-känslighet

Snabb = stilla

Långsam = suddig

Hög känslighet = mer ljuskänslig Låg känslighet

Bländarvärde

Inställningar

Resultat

Stor bländare = mer ljus Liten bländare = mindre ljus

Stor = litet skärpedjup

Liten = stort skärpedjup

= mindre ljuskänslig

Hög = mer kornig

Låg = mindre kornig

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Samsung EV-NXF1ZZB2IDK, EV-NXF1ZZB1HSE manual Slutarhastighet, ISO-känslighet, Snabb = stilla Långsam = suddig, Bländarvärde

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