I shot D400 in Rodinal last night. Developed some rolls at 1:25 . I developed some at 1:50, and some 1:100. It's hard to see with the loupe, but it seems the difference in ratio does really make a difference as far as grain is concerned. Ironically, the 1:100 seems the least sharp of the three dilutions.(posted 8839 days ago)...and I shot a few rolls of D100 at 1:25 at 75deg for 6min; and those rolls are extremely sharp.