Reciprocity Characteristics of JandC400

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bmac

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The J&C site lists the following Reciprocity Characteristics for JandC 400.

To 1/2 second - no adjustment
1 second - 1 stop

10 seconds - 2.5 stops

100 seconds - 3 stops

For those who have used this film, do you believe this is correct? If not, what are your times?

Thanks,
Brian
 

Alex Hawley

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So far they've worked for me Brian. I've done a lot more with J&C 200 than 400, but the numbers are similar, though not exactly the same. Between the three forums I watch, APUG, Large Format, and Azo, I have yet to see someone report a problem with reciprocity on either film.
 

David A. Goldfarb

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That should be about right. Before T-grain films reciprocity was pretty similar for all b&w films.
 
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