It will also depend on the film. Some film had less short exposure
reciprocity failure than others. Also color film color balance can vary
with reciprocity. Sometimes you can get data from the manufacturer but
Mark is correct that you have to experiment to find what works best.
On 4/22/2017 5:14 PM, (Redacted sender msampson45 for DMARC) wrote:
Richard-
Your worries are more-or-less correct. Multiple pops of the strobe, as you describe, do tend to veer into (short-exposure) reciprocity failure.
How far it goes is quite variable... film type, #of pops, type of flash, etc. This sort of thing is what used to give commercial still-life shooters grey hairs, and photo labs extra income from E-6 clip tests and many bracketed exposures.
Run a test: four, six, eight pops at f/64 with your current setup. One of them will probably work, and thus provide a baseline for future shoots.
Mark
-----Original Message-----
From: Richard Lahrson <gtripspud@xxxxxxxxx>
To: pure-silver <pure-silver@xxxxxxxxxxxxx>
Sent: Sat, Apr 22, 2017 7:53 pm
Subject: [pure-silver] Still Life Strobe Question
In working in still subjects and strobe, would it be true
that four exposures say @ f/64 equals one exposure @ f/32
(strobe light only)?
When you run tests for the zone system, advice is sometimes
mentioned about cumulative exposures not quite being equal,
like not giving enough threshold exposure or something.
Any advice appreciated!
rich
