Compensating Reciprocity Failure

From: Erich C. Decker <fotair_at_domain.name.suppressed>
Date: Wed 23 Aug 2000 - 22:58:18 PDT

Hi,

Does anyone use ILFORD HP5 Plus sheet film for pinhole photography?
If yes, I need advice.

The manufacturer has supplied my with a reciprocity failure chart
that end with 35 seconds metered time, transforming into 200 seconds
actual exposure time. On my last shooting meter reading was 2 minutes.
A wild guess was to compensate for 5 minutes, but both negatives
came out quite underexposed.

The reason I use HP5 is that in Europe it is:
A) cheaper than Kodak
B) An excellent film for (almost) any photographic purposes
C) Can be generously pushed and pulled
D) I juts like it

Do any of you HP5 users (assuming there are a few worldwide)
have any personal experiences to share?
I need corrected exposures times, let's say from 1 to 5 minutes.

Erich
Received on Thu Aug 24 01:55:47 2000

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