Mamiya sekor 100mm f3.5 vs sekor 127mm f4.7

As far as known, it is the same formula (Tessar type) - given the speed, presumably without a diameter change, so the centre performance should be the same. The 127mm does cover Polaroid while the 100 does not, so it is probably safe to say the 127mm will have the better corner sharpness on 6x9.

The 100mm was made in a late multicoated version (with rubber covered barrel), and that one will for obvious reasons have higher contrast (it is however notorious for coming stuck whenever the lubricant is lost)...
 
sevo said:
As far as known, it is the same formula (Tessar type) - given the speed, presumably without a diameter change, so the centre performance should be the same. The 127mm does cover Polaroid while the 100 does not, so it is probably safe to say the 127mm will have the better corner sharpness on 6x9.

The 100mm was made in a late multicoated version (with rubber covered barrel), and that one will for obvious reasons have higher contrast (it is however notorious for coming stuck whenever the lubricant is lost)...
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Thank you very much :)
 
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