Want to see the effect of no OLPF on the D7100?

Started Apr 5, 2013 | Discussions thread
jtra Contributing Member • Posts: 859
Re: Looks like moire to me...

Whalligeo wrote:

If you scale the higher resolution images down to the same as the D700, then you cant see it.

Not really, moire can be seen at small resolutions too:

Some selected pictures from http://betterfamilyphotos.blogspot.cz/2013/03/thats-moire-nikon-d7100-sample-moire.html are here:

D7100 http://www.flickr.com/photos/93500598@N02/8591914110/sizes/k/in/photostream/

D600 http://www.flickr.com/photos/93500598@N02/8590809993/sizes/k/in/photostream/

It is visible at resolution of 2048 x 1365, that is 2.8 megapixels.

If D600 would have properly strong AA filter, you would see no moire at 24MP (though sharpness would be quite limited).

Weak AA filter is somewhat a compromise: it prevents worst kinds of moire (but not all of them) while not significantly reducing resolution (with false details).

No AA filter is worse since you can get moire from low contrast patterns too (unlike with weak AA filter; like this duck feathers http://photo.net/nikon-camera-forum/00bVRS?unified_p=1 ).

Without AA filter you also get false detail everywhere (false detail is ok when it matches expectations, but bad when not like here: http://www.flickr.com/photos/8609505@N08/8581177903/in/photostream/ ). This can be however removed enough by downscaling.

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