Fixing moire issues in camera

I work for a small photo studio and we are experiencing lots of problems with moire in our images. We all use Nikon D810 cameras with 85mm and 50mm lenses interchangably. Does anyone have any ideas on how to eliminate or reduce moire banding in camera before we bring the images in to Photoshop? We do not have issues fixing it in our post-production stages but we'd like to get rid of it before hand.