Archived posting to the Leica Users Group, 2000/11/07

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Subject: RE: [Leica] Exposing TMAX 400 vs Tri-X
From: Austin Franklin <austin@darkroom.com>
Date: Tue, 7 Nov 2000 23:33:53 -0500

Would you mind describing your development process?

- ----------
From: 	Peter Shier
Sent: 	Tuesday, November 07, 2000 10:53 PM
To: 	leica-users@mejac.palo-alto.ca.us
Subject: 	[Leica] Exposing TMAX 400 vs Tri-X

Novice B+W film question:

I am using an M6 TTL 0.85 and I have noticed in past then when I shoot a
roll of TMAX 400 followed by a roll of Tri-X in the same light, the Tri-X is
all overexposed. I decided to test this a little more clearly by shooting a
roll of each in the exact same conditions. I shot a stark white wall with my
Noct at F8 using the meter reading (1/30) and then using every other shutter
speed on the dial.

The TMAX shot at the meter is a medium gray as I expected. It is a bit
lighter than my Kodak gray card, but I needed to hold them side by side to
determine that. The whole series gives a range of 9 clearly distinguishable
tones.

The Tri-X shot at the meter is nearly white! It gives a range of 8 tones.

Is this a known quality of Tri-X? It looks like I have to compensate by
about 2 stops to get the same exposure from both films.

Thanks,
Peter