DP3M photos

Started Jan 29, 2013 | Discussions thread
richard stone Senior Member • Posts: 2,190
The usual suspects

As usual, the same people show up to claim that the "color blotches" are a big problem. Between those and the banding people and the responses about two thirds of the thread is taken up with the photo equivalent of a food fight. And is about as significant.

Personally I thought the images posted were dreary, although with very even lighting, probably due to overcast skys, which in turn leads to underexposure and, with underexposure and the lighting, to odd and not so pleasing colors. They were amazingly sharp and crisp images. I was looking for a portrait, too, because 50mm would be (in theory) a more useful lens focal length in that regard than a wide or normal lens length. Was the city depopulated that day? Mysterious. The lens looks superb. As we would expect. The sensor is (in theory?) the same as on the other cameras in the series.

However, given that it was an overcast day most of the colors look excellent considering that the images "reflect" the colors from the sky as the light source. Images of people on an overcast day would likely have the same color issues.

But all of this is more to question why Sigma chose those images to illustrate the use of the camera than anything else. The images show a very sharp 50mm lens attached to a sensor that is about the equivalent of  30MP Bayer sensor. So at this point we have a wide array of digital camera reviewers and users who consider the DPM cameras to be superb, and yet, on this site, in this thread, we have our own usual small but determined group of doubters posting that the images and cameras are no good.

Hmmm. What to think? Who to believe?

Second, banding. This issue was raised by the same people in the DP2M initial images, and yet.... Banding is not a DP2M issue now. The DP3M will undoubtedly use the same processing as the DP2M, which now has minimal (unobservable) banding.

So the posts about banding are what? Another chance for some posters to prove how observant they are? That they would buy the DP3M if only it were perfect? Another chance to show that M. Reichman et al are wrong about who a DPM camera is for?

There is no doubt that the Bayer sensor cameras are probably easier to work with and more developed in terms of the issues presented in this thread. It may be easier to get the colors right (in the sense that the colors appeal to what people think they saw and want to see) and "banding" may indicate that the manufacturing and processing of the sensor/image is more difficult for a small firm like Sigma/Foveon, rather than indicating that the final results will not be superb.

As for skin tones, I take H. Bowman seriously, but I do not see the issue quite the way he does. Skin tones are difficult, but when the DPM cameras produce superb colors from everything else, what are we to think? Since the beginning the Sigma skin tones have been an issue, not because they are so inaccurate, but because they are very sensitive to how the scene is illuminated. And very sharp. Just like the rest of the image.


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