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Author Topic: Probable error in the P-MPpix Map  (Read 1602 times)

Offline gt13013

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Probable error in the P-MPpix Map
« on: April 26, 2014, 02:24:02 pm »
<div id="linkdxomark">This a comment for <a href="http://www.dxomark.com/index.php/Lenses/Sigma/Sigma-50-500mm-F45-63-APO-DG-OS-HSM-Nikon">this page on the website</a></div>Hello,
Concerning the Sigma 50-500mm F4.5-6.3 APO DG OS HSM tested with the Nikon D7100, there is a strange P-MPpix Map (click on Measurements > Sharpness > P-MPpix Map). At 500mm, the performances improve drastically for very small apertures (more than F/22). It seems conflicting with physics law of diffraction ;-)
Link for checking:
http://www.dxomark.com/Lenses/Compare/Side-by-side/Sigma-50-500mm-F45-63-APO-DG-OS-HSM-Nikon-on-Nikon-D7000-versus-Sigma-50-500mm-F45-63-APO-DG-OS-HSM-Nikon-on-Nikon-D7100-versus-Sigma-50-500mm-F45-63-APO-DG-OS-HSM-Nikon-on-Nikon-D800___465_680_465_865_465_792
Regards,
Gerard

« Last Edit: April 26, 2014, 02:33:51 pm by gt13013 »