In my experience, you are better off fixing it when you are shooting. Even a few inches of movement can dramatically reduce or eliminate moire in your files. There are 2 types of moire: color and pattern. You can sometimes look at the different color channels to see where the evil lies. And pattern? ouch. This is the tough one. Sample from neighboring pixels if you can do it, but it is much more difficult to remove.
[a href=\"index.php?act=findpost&pid=193129\"][{POST_SNAPBACK}][/a]
For two years I swore the original 1ds would not moire, then went through a two week period where every client's select (from different projects) had moire, some color, (fixable) some pattern (hell).
The 1ds2 I see very little moire on with continuous light, more with flash, (which makes sense) but on strange areas like Kahki pants.
the worst I see is on the least obvious, like those soft almost fluffy shell tops in red and blue.
I would think they would never moire as they don't seem to have a pattern, but it will appear.
In my experience pulling back from a frame doesn't change much, though coming in closer does, (obviously coming in closer is the hard part), so if I see moire, or think it's coming, I shoot the session and then reshoot the session very quickly closer so the effected garmet can be added in in post.
Once again, flash seems to be more of the culprit than continuous light, even at high shutter speeds, though I should stress, that moire is not the everyday occurance for me, just something that pops up from time to time and though I have my theories that the 18mpx backs and 30mpx backs moire less than 22mpx, that is probably just conincidence of what I am shooting at the moment, though I somewhat think 22mpx is the most likely to moire for my work.
I work with one retailer that does their own in-house processing in C-1, about 500,000 images a year and they swear that the 22mpx backs are more prone to moire than any other camera, so at half a million images a year I guess their suppositions are probably close to correct.
One thing that is a heart stopper is c-1 version 3's previews, Since the previews are just partial renders of the image, and of low density, depending on computer you can see moire that makes the room gasp. 99.999999% of the time it's not there, but those previews can make your heart stop and the only answer is to run the focus window continually to check.
V4 will fix this as this previews are more of athe fully rendered look, though even with the previews for thethering, I'm rock solid and happy with 3.78.
There has always been a lot of talk that film didin't moire, (though at times it did), but with film we never saw it scanned as we shot to really know what would happpen once it was converted to digital. With digital capture we see it on the spot and usually fix it which I would assume makes the pre press people's lives much easier.
JR
