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Box vs. iso

 

I forgot to mention (for those who might not know) that "box speed" and iso are sometimes quite different. Iford sells a fast film called Delta3200. One might assume the iso of the film is 3200 because the box says so in large type, but Ilford's technical information states the film is iso1000 (which is not mentioned anywhere on the box). Why the difference? Because the film is an honest iso1000 but low contrast, making it a good candidate for pushing to 3200 and beyond with usable results. So for Lambrecht's advice while using Delta3200 you would start from iso1000 and adjust accordingly.

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