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General Photography
need some help understanding ISO
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<blockquote data-quote="Joseph Bautsch" data-source="post: 15626" data-attributes="member: 654"><p>Kodachrome and Echtachrome came in ASA speeds of 25, 64, and 100. Yes color film was subject to grain problems just like B&W. The grain problem with B&W prints is more prominent because of the enlargements made from the 35mm film to what ever size print being made. The larger the print the larger the grain. With color slides being projected on a screen the grain was not noticeable. However if you are printing color negatives to paper the grain would be noticeable just as with B&W depending on the enlargement size. With 35mm B&W and color negatives I could make 8"x10" prints that were relatively fine grained. Going up in print size from there the grain started to show up.</p></blockquote><p></p>
[QUOTE="Joseph Bautsch, post: 15626, member: 654"] Kodachrome and Echtachrome came in ASA speeds of 25, 64, and 100. Yes color film was subject to grain problems just like B&W. The grain problem with B&W prints is more prominent because of the enlargements made from the 35mm film to what ever size print being made. The larger the print the larger the grain. With color slides being projected on a screen the grain was not noticeable. However if you are printing color negatives to paper the grain would be noticeable just as with B&W depending on the enlargement size. With 35mm B&W and color negatives I could make 8"x10" prints that were relatively fine grained. Going up in print size from there the grain started to show up. [/QUOTE]
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need some help understanding ISO
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