NEX-7 : Moiré and other Tradeoffs - and how to counteract them Let's face it. How often do you seriously have to reduce moire? Infrequently, and when you do, it's usually localized in a photo. So, why reduce overall sharpness with a strong AA filter? Clearly, camera makers are reducing the AA filter, so this brush in Lightroom 4 is going to be great! A local moire reduction brush. Right on time, Adobe!