If your film will remain motionless during the exposure, I have found the T-max film base (and other maybe) to be stiff enough that it holds flat enough to be all in focus even wide open (f4) at 2x enlargement in a glassless carrier. You can check the focus spread from center to edge yourself if you have a scale on your enlarger column (should be less than 3mm*). I don't use glass with 4x5 when doing short exposures at 2x, but that is not a recommendation, just a statement .
Originally Posted by Michael R 1974
*CoC about about 0.15mm on the print
Last edited by ic-racer; 11-08-2012 at 10:01 AM. Click to view previous post history.