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Reichman: Sigma's only hope, bundle it with their least bad lenses



 
 
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Old June 10th 11, 03:59 PM posted to rec.photo.digital.slr-systems,rec.photo.digital
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Default Reichman: Sigma's only hope, bundle it with their least bad lenses

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David Dyer-Bennet wrote:

Sigma has a history of using less-than-optimal images in its
publicity, so these may not be the best the camera can do. *They are
also saved at 15 MP, not the claimed 45 MP. *


Sigmas number of 45MP is based on counting the three separate color
sensors at each site separately; that is, it's a 15MP non-Bayer
camera.

It's not in any useful sense a 45MP camera; resolution
measurements on previous Foveon-based cameras make this very clear.


very true.

A 15MP non-Bayer camera should show somewhat increased
resolution (as measured by actually photographing things and
seeing what you can resolve in the resulting images), especially
color resolution, compared to a 15MP Bayer camera; but nothing
like 3x.


nothing like 2x either.

where the difference lies is the aliasing and sharpening added in the
raw converter. in other words, it's fake detail.
 




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