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Acros vs TMax400

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Acros vs TMax400

Inläggav vicnor » 17 jan 2017, 14:47

TMY vs Acros.png


Första gången jag fotade TMax400 så slogs jag av hur lik filmen var Acros i sin look. Det skadade ju inte att jag hade just fotat klart en rulle Acros. Jag kollade in responskurvorna i respektive datablad och de såg rätt lika ut. Men var de verkligen lika?

Jag tog kurvan från Acros-diagrammet och skalade om den så att 400 nm, 500 nm etc låg på samma sträck som i Kodak diagrammet. Men Acros-diagrammet visar relativ ljuskänslighet medan Kodak-diagrammet visar absolut ljuskänslighet så man får lägga vikt vid kurvornas form och inte hur höga topparna och djupa dalarna är.

Men ja, kurvorna är väldigt väldigt lika varandra. (Testa och jämför Tri-X med vad som helst :P ) Man kan lätt föreställa sig att det har varit en hel del reverse-engineering åt båda hållen och att Kodak fått en hel del "inspiration" från Fujifilm när de gjorde en ny TMax400-emulsion 2007.
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Re: Acros vs TMax400

Inläggav jojonas » 17 jan 2017, 16:35

helt klart intressant!

om jag tolkar det rätt mot färgad våglängd så verkar Acros ge mörkare grönska

de är ändå jämförbara vad gäller reciprocitetsavvikelse också

by , on Flickr
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Re: Acros vs TMax400

Inläggav vicnor » 17 jan 2017, 18:32

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