Above image TMZ rated at EI 1600 processed in T-Max developer
In fact Kodak state in their datasheet that TMZ can be rated between EI400 and EI 25,000 with their developers XTOL and T-Max. I can't imagine what it looks like at 25,000 but rated between 800-1600 it is good enough especially with the T-max developer, which tends to smooth grain and gives the best tonal range.
I decided to rate this film at 3200 ISO (box speed) and process in Rodinal 1:25 for 8 mins.
Below is a shot taken on a very dull day after a storm had brought down a tree:
There was very little light, I can't remember the exposure but I metered for the shadows in the tree on the left and closed down two stops from that reading.
Which brings me to what I feel is the films main weakness – its tonal range.
But for those situations where you need speed or the light is low, P3200 (T-Max developer) are a pretty useful combination, although the films real speed is 1250-1600 in my opinion.
© Images and text Mark Antony Smith