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Photography Question 
Andrew Laverghetta
BetterPhoto Member Since: 9/13/2004
 

push processing B&W


I've been looking all over kodak's website and I can't find a link to push processing their film. I think I printed some charts at one point but I'm not sure where it is now. I've got Kodak 400 Tri-X and would like to push it to 800. I'm using Kodak's TMax developer with the whole bottle just mixed to yield a gallon of developer. Thanks for your help. I'll continue to look but wanted toms extra help.


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11/1/2005 8:21:14 PM

 
Gregory LaGrange
BetterPhoto Member Since: 11/11/2003
gregorylagrange.org
  33% extra time for each f/stop.


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11/1/2005 8:46:47 PM

 
Andrew Laverghetta
BetterPhoto Member Since: 9/13/2004
  so that would be about 8 minutes? It says normal would be 6 minutes in Tmax developer for the 400 ISO film. Being pushed 1 stop (set at ISO800) It will add about 2 minutes?

Thanks!

I'm hoping that it will come out decent. I've already taken one roll like that and it was a studio portrait set up. It was mostly a high key thing so I don't think there will be as much shadow detail to be lost? Thanks again for your help.

-Andrew


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11/1/2005 9:21:07 PM

 
Jon Close
BetterPhoto Member Since: 5/18/2000
  Kodak Tech. Pub. F-4017 - Tri-X Films has the needed data for various developers and push processing. Also, Kodak Tech. Pub. J-86 T-MAX Developers. They indicate that processing Tri-X at ISO 400 and 800 is virtually the same.


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11/2/2005 5:39:52 AM

 
Andrew Laverghetta
BetterPhoto Member Since: 9/13/2004
  So what will my results be like if I were to use the same developing time? The negatives might be a little light and I would need to use a higher contrast filter for RC paper?

Is the lattitude THAT wide that it can make great photos without adjusting developing time? I had underexposed some fuji 1600 color print film before and I didn't really like the results so much from a pretty good lab just because they seemed darker. I guess they might be better if I could print them myself but will it still look natural? Since the large reason is for portraits, I want to make sure they look pure. Do you think it may be beneficial to up the developing time by maybe 30 or 45 seconds?

Thanks again, I really appreciate it. I just want to make sure that I know what will give me the best results.

-Andrew


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11/2/2005 7:20:27 AM

 
Gregory LaGrange
BetterPhoto Member Since: 11/11/2003
gregorylagrange.org
  A change in exposure times with the enlarger, and maybe a 3&1/2 contrast filter instead of a 3.
At first I was going to say shorter exposure time, but a 3&1/2 is a darker filter, so if you use that you may have the same or longer time.


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11/2/2005 11:33:34 AM

 
Andrew Laverghetta
BetterPhoto Member Since: 9/13/2004
  Ok, just going over everything to myself and to make sure it's right.

I can process the ISO400 Tri-X that I shot at 800 as normal because it is only one stop. I have bracketed with TMAX 100 by 1 stop and have still had printable negatives underexposed by a full stop. Shooting at 800 instead of 400 is just like shooting at 400 with -1 exposure comp?

Thanks

Andrew


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11/2/2005 1:56:37 PM

 
Gregory LaGrange
BetterPhoto Member Since: 11/11/2003
gregorylagrange.org
  yeah


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11/2/2005 3:14:09 PM

 
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