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DPChallenge Forums >> Hardware and Software >> Darkroom Developing HELP
Showing posts 1 - 6 of 6, (reverse)
04/07/2008 06:12:12 AM · #1
I shot a roll of iso 400 film two stops down. On top of that mistake, I took my light meter readings at iso 200. How should I go about developing?
04/07/2008 07:05:35 AM · #2
walmart would be a good start, just let them know that you are under exposed

Message edited by author 2008-04-07 07:06:15.
04/07/2008 07:45:05 AM · #3
What kind of film was it? If it was color neg film see below:

If you mean you under exposed it by 2 stops but your meter is at 200 that means your only one stop underexposed. Take it to pro lab not walmart and tell them to push process it 1 stop

If you over exposed by 2 stops you are most likely going to have to re-shoot.

If it's B/W film and your developing your self. What developer are you using and what film are your using , also what temp to you develope at.

Message edited by author 2008-04-07 07:49:50.
04/07/2008 10:59:30 AM · #4
ISO 400 metered at ISO 200 = one stop overexposed.

"2 stops down" in unclear. If you mean the lens was set 2 stops smaller than it should have been (f/22 instead of f/11, say, which is what we usually mean when we say we stop down) then your one-stop overexposure becomes a one-stop underexposure, which is not that big a deal with B/W film or color negative film most of the time, and might even be an IMPROVEMENT with color slide film over the "correct" exposure.

If "2 stops down" means you had the lens two stops more open than it should have been, you have real issues because added tot he ISO overexposure you now have three stops of overexposure, which is quite a lot.

If you're processing your own B/W you can deal with it, color film is probably not going to come out satisfactorily. Iam is on the right track for dealing with it in B/W; we need to know the film, what chemicals you use, etc and we can make a recommendation for processing.

04/07/2008 11:22:58 AM · #5
If processed corrctly, color neg film has tremendous latitude. A 2 stop exposure error can still give respectable results, depending on the emulsion and the lab. It helps if you know the resulting exposure error and can tell that to the lab.

If it's slide film (E6), you can have it push/pull processed and get something, though it'll get grainy/ugly pretty quickly. Again, if you know what the net exposure error is, that goes a long way. If you don't know, you can send the film to a good pro lab and ask them for a snip test. They'll process the first few frames and see what the exposure looks like. You can either trust their judgement and have them "judge and run" or consult with you on how to process the remainder of the roll.

For B&W film, you have even more latitude than color neg, but you have to account for over/under exposure in the processing.
04/08/2008 03:59:08 PM · #6
sorry for my ambiguity, it was b/w film and i took my light meter at two stops underexposed. I developed the film myself for double the amount of time and it came out nearly perfect. It appeared a bit contrasty but not to bad, thanks for the help!
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