> John, I am trying to understand your thesis. if I should use a slower and finer grained film with 35mm, I can duplicate these results using a faster, grainier, yet larger formatted film in 6x7? or, an 8x10 produced by a fine grained 35mm negative, can be duplicated by finding a sufficiently inferior film in 6x7? makes sense(posted 8322 days ago)Yep, that's the gist of it. Or let me explain differently; in the past I found that going to Delta 3200 in 6x7 for EI 1600 was worthwhile, even with a max lens aperture of f2.8 (compared to f2 in 35mm) and gave somewhat better quality overall than HP5+ in 35mm at EI 800 for the same print sizes. Or to state it differently, D3200 in 6x7 at EI 1600 and f2.8 was superior to HP5+ at EI 800 in 35mm at f2, with the intent of maintaining the same minimum shutter speed.
It appears to me that new Delta 400 has changed that imbalance; I obtained equal overall print quality.
I realize the parameters are rather narrow, but they reflect the situation I shoot in a lot.