12-04-2017, 07:55 PM
Quote:Are you sure 25 is retrofocus? With 19 mm flange distance I am not certain it is needed.
The 25 out of necessity is a fairly strong retrofocus design considering Olympus' design parameters, where the 45 is not, or less so, and with the design parameters in mind it therefore ends up having more elements.
Retrofocus design could explain it, sure. On the other hand, new to be, shorter 17/1,2 is to have less lenses, 15, thus I assumed it might be a design choice.
I agree on purpose of these lenses. ðŸ˜