5D3 vs D800: Microlenses

Started Apr 22, 2012 | Discussions thread
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5D3 vs D800: Microlenses
Apr 22, 2012

The 5D3 sensor:

http://www.sensorgen.info/CanonEOS_5D_MkIII.html

is essentially the same as the 5D2 sensor:

http://www.sensorgen.info/CanonEOS_5D_MkII.html

but it has a signficantly higher QE (0.57 stops higher). This is most likely due to a more efficient gapless microlens covering.

As it turns out, the efficiency of the microlens covering has much to do with how much of the light at wide apertures makes it into the photosensitive area of the pixel. The 5D2, for example, lost 0.35 stops of light at f/1.4 and 0.55 stops of light at f/1.2 (essentially making f/1.4 and f/1.2 the same effective aperture):

http://www.dxomark.com/index.php/Publications/DxOMark-Insights/F-stop-blues

The D3s lost 0.3 stops of light at f/1.4 (essentially the same as the 5D2), and, presumably, also about the same at f/1.2.

So, the question is if the new microlens by Canon might not improve upon that significantly, and give the 5D3 a greater low light wide aperture advantage over the D800.

Would be nice if DxOMark updated their test on the issue.

Canon EOS 5D Mark II Canon EOS 5D Mark III Nikon D3S Nikon D800
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