Reciprocity Characteristics of JandC400

[bmac]

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]

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]

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