Andromeda Galaxy Mosaic

This is an example of a mosaic of the giant Andromeda Galaxy M31 taken with my CB245 camera using a Meade F3.3 focal reducer on a CG11 telescope. There are about 28 overlapping tiles for this mosaic, and each has about five separate exposures of 60 seconds. The mosaic was assembled with the merge-down layer command in Photoshop adding one tile at a time, either on top or below the existing partial mosaic. Alignment used the 50% transparency command, and the stars aligned very well from tile to tile. Intensity matching was also needed.