15 seconds

[Jhausler]

I've been way lazy recently and have a handful of films waiting to be processed. All different (of course).

I'm currently using Ilfotec DDX.

I have a roll of TMAX P3200 that I shot at 800, recommendation is 7:30.
I have a roll of 400TX shot at speed, recommendation is 8:00.

Process for 7:45 and call it good, or don't be lazy?

FWIW I scan my negs, not print.

Thanks,
Jesse

 

[lynnb]

I'm lazy and would probably go for 7:45, but:

TMAX3200 underexposed at 800 and overdeveloped will tend towards a dense negative and possible blocked up highlights;

400TX exposed normally and under-developed will tend towards good shadow density but thin highlights.

The question is: "is 15 seconds significant?". Not sure, but I'd probably risk it.

EDIT: I'd be more comfortable if you took advice from someone who has specific experience with the films/exposure/varied development in your circumstances. I've exposed quite a few TMAX3200 @ iso 1600 and 1000 but only used recommended development times. I've never under-developed Tri-X.

 

[jonmanjiro]

I'd do it. 15 seconds less/more developing at 7.5 to 8 minutes developing time is pretty much insignificant. Not having the temperature of the developer bang on would probably make a bigger difference.

 

[Ronald M]

One can compensate with higher contrast for slight underdevelopment. More difficult to go the other way.

I would add to one tank after 30 sec or even run two tanks, one 2 min behind the other.

I also do not screw around with different films. Pick one and use it. I will use a tripod before fast film.

 

[sevo]

These days even frozen TMAX 3200 will have lost some speed (down from its native 800), so there is no point in trying to nail its exposure or development by paperwork. You probably are already off in exposure, so I'd go for 8:00 - that will be good enough for further tests, without interfering with the TX...

 

[Jhausler]

Thanks everyone for the advice. i think i'm going to just do it for 8min even and take it from there.