I am in the happy position of both. Never used them in a side by side comparison but some notes: If you need movements the 72 mm is the way to go. The 80mm on a recessed lensboard will fit inside the closed master technica. Depending on the application you could get away without center filter on the 72mm. On the 80mm I think you can't go without. The same center filter of the 80mm will fit on the 58mm. I wish you wisdom with your choice!
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