Late reply; but the 175mm mentioned didn't sound right. Komura may have been even more conservative than Schneider with their data. Mine covers 5x7" (209mm) with good sharpness even wide open, but with no room for movements. There is also a misprint in the catalogue, unless I have a slightly different version: Filter thread on my copy is 72mm. Shutter is a Copal 1. One of my favourite lenses; the shallow DOF on the ground-glass and the overall rendering are something to behold!