Dev times for push?

[jonsparrow]

Hello, new member here.
I have a question.

I am using arista premium 400 film. Rodinal at 1:100 semi stand development at 24min.
I shot a roll at 3200. i know its gonna have lots of grain, but im just experimenting.
My question is, with my current set up, pushing to 3200, what would my development time be? I dont want to change the ratio. Also, if some one could also explain how to calculate the development times, if I want to try different push speeds, that would be great.

Thanks,

Jon

 

[Oren Grad]

Suggested starting points for many film/developer combinations can be found in the Massive Development Chart - I've entered "arista premium" and "rodinal" to get this page:

http://www.digitaltruth.com/devchart.php?Film=Arista+Premium&Developer=Rodinal&mdc=Search&TempUnits=C

There's no standard formula for calculating "push" times - each film/developer combination behaves in its own way, and quirks in your technique can make a difference too. You need to run your own tests and tweak your process until you're happy with the results.

 

[jonsparrow]

ok thanks.
well the 3200 they have listed is for a 1:50 mix at 33min. so im going to try 1:100 at 66 min, and see how that turns out. will post results.

 

[StoneNYC]

ok thanks.
well the 3200 they have listed is for a 1:50 mix at 33min. so im going to try 1:100 at 66 min, and see how that turns out. will post results.

Remember that FOMA400 (which is the Arista stuff) has the WORST reciprocity characteristics ever, this may somehow affect it's ability to be pushed, I know this sounds strange, but with the limited amount of light that will be hitting the film, there may be additional compensation needed.

Also, the 1:50 times are for standard agitation, meaning 10 seconds of inversion every minute for 33 minutes... so that would mean in your plan, that you would be standing there for over an hour and inverting the tank every minute for 66 minutes... you are either brave, or crazy, or are thinking that stand development will work, but that certainly won't, especially if you want to push a film like Foma400...

Rodinal really isn't ideal for pushing film to the extremes... and I'm a little confused why you insist on using the 1:100 ratio, not criticizing, I'm just trying to understand why.

Look at times for HC-110(B) or DD-X if you want to push the film, those are your best pushing film options as far as I'm concerned.

But I would push HP5+ to 3200, that actually pushes excellently in DD-X.

Good luck!