I an wondering what others people thoughts on this are, I use a standard Paterson contact printed for both 35mm and MF.
I generally print contact sheets with the contrast set to 2 on the multi-grade head or if using hand held filters I hold a 2 filter under lens. my logic is i tend to print 80% of my stuff at this grade.
Does this make a difference through the glass ? am i just wasting energy ? does anyone else do this? thoughts please
Not enough to make a difference. I see maybe about 1/3 stop of light loss from the glass, but I'm using plain old window glass without any AR coating.