Re: Richard Henry's Controls in B&W Photography

Jonathon Russell (hylandscot@voyager.net)
Thu, 25 Mar 1999 08:22:39 +0000

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John Erbes wrote:

> Has anyone done densiometer measurements across a uniformly-exposed roll
> film negative (edge-to-edge) to measure development consistancy?
>
> John Erbes

John,
I have check edge-to-edge density form the JOBO and found that it
amounted to no more than .02 to .03 (roughly 1/6 th F stop change).

Jonathon Russell

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