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MOIRE DISTORTION Moiré is a visual distortion caused when an optical line scanning device records a fine detailed geometric pattern.  Named after a swiss photographer Ernst Moiré this distortion is prevalent in digital imaging of fine patterned fabrics and physical objects like brick walls and fences.  Moiré is more pronounced in DSLR video capture than small 3 chip camcorders and the distortion can be reduced by reducing the fineness or detail setting when filming. This distortion can be treated in post production editing but this treatment is time consuming and requires a high skill level. Another consideration is that Moiré distortion is often less visible in the camera LCD viewfinder but then shows up when editing.  Some DSLRs are better at reducing moire than others.  Finally, Moiré distortion is much less noticeable in high resolution recording like 4K. Methods of reducing Moiré are: reduce recording detail to the lowest setting, use a soft focus filter, use Caprock anti-Moiré filters or use a slight off focus lens adjustment.