Falk Lumo replied to (some of) my questions, although in a rather incomplete and data-light way: - - -
Hi again, you address many interesting questions here. Unfortunately, it isn't my current focus of interest, so I'll confine myself to share some of my understandings and opinions with you. I won't be able to do own research on this. Here we go ... 1. Digitally optimized vs. film lenses I think that distinction is a thing of the past when it comes to dSLRs. Due to the retrofocus design of SLR lenses, the angle of incidence even of outer rays never becomes too large. It used to be an issue but I think the microlens designs solved that. Olympus created telecentric designs and a huge mount for a small sensor for nothing. This is the main reason we got ��T now. 2. Shorter flange distances The NEX-7 fails miserably with wide angle lenses on its shorter flange distance. Ask NEX-7 users. OTOH, the Leica M9 performs rather nicely with wide angle film lenses (M mount). So, a proper microlens design is crucial and I don't buy into this Exmor is thinner speech from Sony. When large angles of incidence become a problem, then larger pixels (read fewer) help more than anything else. This is why the NEX-5 may have a better image qualite than NEX-7. 3. Fringing Wide angle lenses should produce more CA than sensor fringing, maybe with the single exception of the new 24MP Sony APSC sensor. 4. Vignetting But when large angles of incidence become a problem, you should see it first with vignetting becoming extreme. DxO looked at that, the link is here: http://www.dxomark.com/index.php/Publications/DxOMark-Insights/F-stop-blues You can derive and compare the loss of large incident rays from their data, for various sensors. And that's about it what I can contribute to the discussion. Thank you for your understanding. Kind regards, Falk
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