Probably a Question of Logic...

lynn

lynn
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I consider myself an intelligent and well-educated person, but, alas, logical thinking has never been one of my strong points.
I think I mentioned - once-upon-a-time - my ca. 1967 Svemapan. Well, I figured I would give it every possible advantage in life and run it through my Ricoh P&S, but the Ricoh sets the ASA at 100 without a DX code and the Svemapan is ASA 130.
:) 130. Now I ask you...... :confused:
Anyhow, I'm assuming that such old film will lack a DX code, and I have the advantage of Exposure Compensation on the P&S, but how - and how far? - do I go?
I've been cogitating for an hour. I must be thick. I figure I can set the EC at minus.......1? or minus .5? Is there an equation I can use?
I thank you in advance: for the advice and for keeping a straight face. :)
 
Lynn, Frank is right! I do this all the time with FP4 in my Contax TVS. It works fine.
 
Lynn, as Frank said, it probably would not make a difference if you rate it at iso 100. However, if you really want to know, iso 125 and iso 160 are 1/3 and 2/3 stops from 100. To answer your question, the exposure compensation is approximately minus 1/3.
 
Everything said so far is entirely correct. Further considerations, just to make life more complicated ...
1 Film that old may or may not perform to original specs. Suggest you run one roll through before committing alot.
2 Assuming this is a negative film, you may prefer to overexpose a bit -- maybe 1/2 to 1 stop.
 
Well. Yes. This just made things a LOT easier. :)
It's really old, and not-properly-stored, negative film. I s'pose just exposing at 100ASA will take the quirks into account...for as far as that is possible.
I'm grateful. Thanks, all.
 
it's negative but not colour negative. Overexposure might not be the most desired thing to do, might increase grain even more, however 1/3 stop should not be a problem.
 
Just in case anyone is curious about the outcome of this query:
I shot the Svemapan over a period of several weeks, had it developed with minimal expectations, and finally scanned a couple of strips last night.
The "oldness" is apparant - there are shots with dark bubbly edges, and there is grain, and there are mysterious speckles here and there - but I was almost jubilant at the results, as they were much nicer than I had dared hope.
(I mean, really, I graduated from High School the year this film expired!)
A few examples follow...

And Happy 2006!
 
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