Sigma's best vs. their best . . .

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Scottelly
Scottelly Veteran Member • Posts: 9,271
Sigma's best vs. their best . . .
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I saw the article about the Sony A7r III sample photos in the image comparison here on DPreview, and I decided to take a look. I changed the A7r II sample to SD Quattro H S-Hi version, and I switched the Sony A7r III image to the Pixel-Sift version. I think the following samples I captured from my reviewing of the Sigma image vs Sony, Nikon, and Canon images are at least a little revealing. What I'd really like to know is whether the processing was done properly on that raw image from the Sigma camera. If someone can make a significant improvement, I'd like to see it.

Go ahead and look for yourself: https://www.dpreview.com/reviews/image-comparison/fullscreen?attr18=daylight&attr13_0=sony_a7riii&attr13_1=nikon_d850&attr13_2=canon_eos5dsr&attr13_3=sigma_sdquattroh&attr15_0=raw&attr15_1=raw&attr15_2=raw&attr15_3=raw&attr16_0=100&attr16_1=100&attr16_2=100&attr16_3=100&attr126_0=2&attr126_3=4&attr171_3=1&normalization=full&widget=1&x=-0.3471641682844264&y=0.22438022998903984

To me there are advantages of the SD Quattro H (primarily the lower price, but also the lack of color moiré). It does seem that the ultimate image resolution comes from the Sony in pixel-shift mode though, which is what I would expect, because it almost simulates a 42 MP Sigma SD Quattro F, which is a camera that does not exist. Maybe this will motivate Sigma to make that 50 MP SD Quattro F that I have theorized though. I think that would be wonderful.

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Scott Barton Kennelly
http://www.bigprintphotos.com

 Scottelly's gear list:Scottelly's gear list
Olympus TG-860 Sony SLT-A65 Sigma SD1 Merrill Sony DT 18-55mm F3.5-5.6 SAM Tamron SP AF 10-24mm F/3.5-4.5 Di II LD Aspherical (IF) +14 more
Sigma sd Quattro Sigma sd Quattro H Sony Alpha a7R II Sony Alpha a7R III
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