Quote Originally Posted by thicktheo View Post
So I bought a package of Fomapan 400 4x5, to try it out. I have HC-110 and Xtol available... which developer should I use, and what is the maximum ISO I can get?
Have a look at the datasheet, and especially at page 2. There's a development time - gamma - ISO speed chart for the Fomapan400 - Xtol (stock) combination. So, 6' seems to be a reasonable development time (20C) and the speed you'll get is a tad more than 200. Multiply this time by about 1,4 and you'll get ~8'30'', which should be close enough for Xtol diluted 1+1.