Hi SGL, I am thinking of spending my next lunar imaging session on just one small section of the Moon on the terminator, taking a stacked image every 3 mins to study the terminator moving across the lunar surface. Why?...I image with a Mak 150 using only a small sensor area meaning a small FoV. I've never got close to finishing a complete mosaic so I thought of this as a different approach. Has this been done before? I have done a 2-frame animation of Petavius taken 2.5 hours apart.