Advantages of Foveon sensor Locked

Started Jun 23, 2013 | Discussions thread
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Roland Karlsson
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Advantages of Foveon sensor
Jun 23, 2013

In the thread named "Will Thom's prediction come true" an interesting sub-thread started - and then the entire thread did hit 150 - pang - thread closed. A rather irritation rule to say the least.

The sub-thread was about what advantages Foveon sensors have.

I said: the main advantage is that all colors are sampled in the same place and did give the reference to http://www.dpreview.com/reviews/nikon-coolpix-a/14 , where you can look at the coin above Mickey Mouse. IN particular, look at the Fuji sample, and please look at ISO 200 for the Sigma sample.

Bobn2 said: its the only advantage.

Lin and Laurence said: there are more advantages, and Laurence also listed:

  1. Edge roll-off
  2. Acuity
  3. no moiré
  4. color accuracy (an arguable point for many but absolutely achievable)
  5. greater "presence" or a 3D effect (nebulous but mentioned in so many publications over 10 years)

Personally I would categorise all Laurence's advantages, except the one about color accuracy (4), as a result of the fact that all colors are sampled at the same position. Laurence's list is a list seen from the user perspective, which of course also is a valid way of seeing it.

NOTE that no moire (3) should be no colored moiré. Moiré overall is also less than with Bayer without AA filters, but its absolutely not "no moiré".

So - whats the advantages?

NOTE - we can all make a list of disadvantages if we want to, but can we make a list of advantages?

And - color accuracy? Is that an advantage of Foveon, as Laurence claims?

I can add three more potential advantages, which (just as Laurence's color accuracy advantage) can be discussed.

  1. The color filters in Bayer sensors, do they age?
  2. It is theoretically possible to add a fourth IR layer for Foveon sensors
  3. potentially a sensor like Foveon could detect all photons, Bayer do filter away 2/3.
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