PIX 2015

50mm Prime with Resolution for a D800? Come on Nikon/Sigma!

Started Jan 4, 2014 | Questions thread
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Scott McMorrow
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Re: 50mm Prime with Resolution for a D800? Come on Nikon/Sigma!
In reply to Nexu1, Jan 5, 2014

Nexu1 wrote:

Nikon 50mm f1.8G: http://www.photozone.de/nikon_ff/631-nikkorafs5018ff?start=1

Sigma 35mm f1.4: http://www.photozone.de/nikon_ff/792-sigma3514dgfx?start=1

Both peak at 3900-4000.

Which are both about 20% below the maximum resolution of 4912 lw/ph of the D800 sensor.

One of the serious problems with the photozone.de resolution measurements is the way in which they measure border and corner resolution.  What they do is to optimize focus in each zone, and then measure resolution.  This neglects field curvature.  Imatest MTF50 measurements made of the corners, when the center is in focus will be much lower than they report.

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