Q Looses the 3-D of the M?

Started Jul 23, 2014 | Discussions thread
Roland Karlsson Forum Pro • Posts: 27,302
Re: what's 3-D?

Lin Evans wrote:

The connection is that unsolicited comments made by non-Sigma users at multiple major photography and equipment shows on numerous separate occasions revealed an unusual number of comments about a "3D" appearance. These comments were not heard at other manufacturer's displays nor have they been reported as being commonplace as they were at the Sigma booths.

As far as I remember those claims were strongest for the old 3 MP sensor and maybe also for the 4.5 MP sensor. And this was for huge prints, even A0. Now A0 is one million square mm. So --- it is 3-4 pixels per square mm. Even at some disyance, you would have strongly visible aliasing.

I do not know - but maybe this has something to do with the claim?

What does this mean? I have no idea. But trying to quantify it is unjustified from a scientific perspective. Something appears to have a dimensional appearance or it looks flat. We could discuss possible reasons until the cows come home and still have no agreement because subjectivity is not quantifiable.

Yes, it is. It takes some population size and some amount of tests in order to show anything. But ... it is clearly quantifiable. For small groups it is harder though. But ... likewise can be said for all subjective opinions. They are very hard to evaluate. As we have seen any time someone here tries to make a comparison by having people look at images.

It's not about "prefering" a Sigma over some other camera at all. It's about perceiving a 3D appearance from a Sigma photo.

A fine line to walk. It would be possible that a flat look and not the irritating 3D look more often is to be preferred

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