Advantages of Foveon sensor Locked

Started Jun 23, 2013 | Discussions thread
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Lin Evans
Lin Evans Forum Pro • Posts: 17,402
Re: Advantages of Foveon sensor

Bobn2 wrote:

Lin Evans wrote:

Hi Mike,

The issue with color "accuracy," as you say, is primarily one of post capture processing, however, no amount of post processing can retrieve subtle variations of hue which were not captured in the first place.

No Bob,

This is exactly the problem with the CFA sensor. If subtle variations of color are not captured - and they are often not captured with CFA sensors, then they can't be reproduced in the finished image or print.

You come to the Sigma forum with the attitude of a few others we see here who do not have and use Sigma digital cameras. You attempt to "school" us in what is wrong with the sensor which we use every day and have a great deal of experience with. Your "experience" is apparently based on what you have "read" elsewhere and not on your own experience. You have obviously not "seen" tests of color "resolution" between CFA sensor and Foveon sensors, some of which were done by dPReview and many others by various reviewers. You have evidently not see the very plain evidence for CFA sensor's inability to properly render red hues.

We tire here of having to constantly explain to non-Sigma users who visit this forum what everyone here already knows. If you hang around long enough, you "may" learn a few more things which you "thought" you already knew, but are quite mistaken about.

I and other forum members here have neither the time nor the inclination to educate every visitor who comes here to "straighten us out" about Foveon technology. You may "think" that you are correct because you have read "all about it" elsewhere. Until you actually "use" the cameras and put in the necessary time and effort to truly know what you are talking about, you are simply an irritation wasting our bandwidth with arguments which have already been discussed ad nauseum.


This is exactly the case, and it is the problem with the Foveon sensor. Colour vision is a defined by a set of three stimuli, and to produce the correct stimuli the filter characteristics have to match the response of the three colour receptors in the eye. The Foveon ones don't, hence the poor metamerism characteristics.

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