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So this started out as designing and testing a 3d printed lens board so I could put the 210mm lens from my Calumet monorail on my Graflex for a trip I have coming up, and then evolved into comparing the Caltar 210 with the Optar 135 in as objective a way as I could manage.
Parameters were as follows: Same scene with the tripod fully locked in so nothing charges except obviously the FOV due to the difference in focal length. Same film stock (Ektar 100 for finest possible grain in color to evaluate sharpness). Both images shot at f/22 (which is typically where a large format lens is sharpest) with 1/30 exposure for the Caltar and 1/25 exposure for the Optar - I would have liked to have identical shutter speeds but the shutters don't line up and frankly given the age of the Graphex shutter the margin of error would probably render the difference meaningless anyway. Both sheets were then developed simultaneously in a temp controlled bath, "scanned" in quarters and stitched in photoshop, and converted with identical NLP settings and no tweaking of anything.
