Dillon Mak Posted January 30, 2020 Share Posted January 30, 2020 (edited) I'd like some help wrapping my mind around understanding these graphs and the information they provide that you get from Kodak data sheets of their film stock. How do I "read" these graphs and what kind of information should I be taking away from them? Edited January 30, 2020 by Dillon Mak Link to comment Share on other sites More sharing options...
Premium Member Aapo Lettinen Posted January 30, 2020 Premium Member Share Posted January 30, 2020 there is documents explaining this very easy way: https://www.kodak.com/uploadedfiles/motion/US_plugins_acrobat_en_motion_newsletters_filmEss_06_Characteristics_of_Film.pdf Link to comment Share on other sites More sharing options...
Premium Member Aapo Lettinen Posted January 30, 2020 Premium Member Share Posted January 30, 2020 the characteristics curve is of most interest for you when exposing the film. the exposure change is presented as log values which are "common 10 base log" values. to convert these to f-stops I do the following: read the curve points which interest you. check how much this is on the log exposure scale on the graph (we call this value X) calculate 10x to return the exposure change as a value (for example if the X was 2 the value change is 100) calculate how manu f-stops the value change is (remember that one f-stop is the value doubled or halved? for example if the change value was 100 then the change is in f-stops.... 2, 4, 8, 16, 32, 64, 128 which is 7 stops ) Link to comment Share on other sites More sharing options...
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