ISO Mistake, how to correct in development ? profesional advised needed.

[fotch]

Listen to them not me, they know more than I do...

[jeffreyg]

I agree with the develop normally. Two stops should work and if printing on multigrade paper adjust contrast by filters. Also you mentioned that you switched back to 400 for part of the roll.

I'm a Miamian as well.

http://www.jeffreyglasser.com/

[andrew.roos]

I would develop normally in Ilford Perceptol which is a speed-reducing, ultra fine grain developer. Tri-X 400 in Perceptol is rated at ISO 200 for normal contrast (see http://www.chrisjohnsonphotographer.com/charts.shtml and the Ilford Perceptol data sheet). So your negatives would only be one stop over-exposed, less dense and with finer grain to boot. The images shot at ISO 400 might suffer, though.

(Note that a speed-reducing developer is not the same as pulling the film. Using a speed-reducing developer will get you the lower speed but at normal contrast. Pulling will reduce contrast.)

Just be thankful you didn't under-expose by 2 stops...

[Keith Tapscott.]

I would develop normally in Ilford Perceptol.

That is what I would use.

[Ronald Moravec]

Pull 35%.. Better to have a flat neg than one with to much density that will not print well.

[pentaxuser]

Were all the negs vital? If so and based on what you have said and what you have been told I'd go with the majority view and especially what Andrew Roos, backed by Keith Tapscott has said.

However if you can afford the risk(small in my opinion)to have some of the negs produce more difficult prints than they should then clip a few negs off the roll and try the Andrew Roos solution. If they produce good negs and prints then do the rest the same way. If not then try what Ronald Moravec has said or try it anyway. That way you won't be left wondering if Ronald's way might have worked better.

Often learning by doing is best.

pentaxuser

[RalphLambrecht]

develop normallyand hope for multi-grade paper to save your contrast.don't'pull. that will make it worse. i'm also thinking about low-temperature development in combination with a pull, but i have not experimented with that yet.

[jnanian]

just process normally, don't do a thing.

[lhalcong]

wow, Many different opinions and solutions for the same problem. Since any of them may potentially be the correct solution, I think the best learning experience for me would be to try them all, although I like the perceptol idea with no pulling. I think it would be good idea to run some test exposing a couple of more rolls emulating the same problem best possible. Then decide based on results. I will store this important roll on fridge in the meanwhile.

Thanks all.

[lhalcong]

oh, by the way. I was shooting 35mm for those who asked.

Any opinions on Kodak HC-110 developer ? Can that also help in a different way ?



thx