Since I don't photograph people, clothing or fabrics.....I'd never given moire much thought. I knew what it was and what it looked like. From the Nikon website: "Sometimes odd stripes or colors will appear in a digital image, either from a high-end digital camera, or from a scanned image. This effect is called moiré and is caused when a fine pattern in the subject (such as the weave in a fabric or very close, parallel lines in architecture) matches the pattern of the imaging chip. When two patterns meet, often a third, new pattern is created. This third pattern is called moiré. Notice in the illustration below the round, circular patterns (on the right) created as the two grids are combined; this is moiré. Subscribe to see EXIF info for this image (if available) In order to reduce (or eliminate) moiré, a special anti-aliasing filter is mounted in the camera. If too strong a filter is mounted an overall soft image will be produced, but with no moiré. If a weaker filter is chosen the image will be sharper, but there is more of a chance for moiré to happen in some circumstances. Nikon has chosen to produce the sharpest image that can be made, even though there may be some moiré in parts of some images." But moire wasn't something I ever had to deal with. Until I processed this photo of a parrott....full frame using my new 600mm that I was testing for focus accuracy and sharpness! On my monitor there is very strong moire in most of the blue feathers in the middle and lower left corner. When I zoom in 100% they are barely visible. And - surprise! When I inserted the image below from my SM website, the moire pattern is hardly visible ....and only slightly more visible on my website. Subscribe to see EXIF info for this image (if available) I photographed a lot of highly detailed feathers, but never encountered this before.