Shot some Tmax 400 recently (Xtol 1:3) to get extra speed for hand held shots at the Shrimp and Petroleum Festival. I was surprised at how little grain I saw in the negatives, and the tonal range was very good. I did not shoot any comparison 100, but will get to it. I am curious if the larger grain in the 400 makes much difference in 4x5, at least in prints of 20x24 and smaller. Has anyone done much testing or have the resolution specs handy?

The hand held worked great. I have a Technika IV with a modern 90mm Rodenstock 6.8 that I cammed. With the bright southern Louisiana sun, exposures were in the 1/250/F16 range and negatives are very sharp. With no mirror slap and the mass of the camera, it may be easier to hand hold than 35mm - until your arm gets tired or the light goes down.:-)