Probably a Question of Logic...

[lynn]

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...... 😕
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. 🙂

 

[FrankS]

Simply expose it at ISO 100.

(Just like a "gimme" shot in golf.)

 

[lynn]

Golf. Ahem.
I'll take your word for it, Frank, and thank you sincerely!

 

[Socke]

Lynn, Frank is right! I do this all the time with FP4 in my Contax TVS. It works fine.

 

[ray_g]

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.

 

[JohnL]

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.

 

[lynn]

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.

 

[Pherdinand]

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.

 

[lynn]

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!

 

[sbug]

That's a nice outcome. I particularly like the shot of the two bicycles.

 

[Pherdinand]

better than expecxted, lynn 🙂 i like the third shot the most