M 31

[p1taylor]

Am I going right way with this, scope ZS80IIED, camera SX H9C, guided PHD, 20 X300 seconds before cloud's rolled in, if you need any other info just ask.

peter

[NickK]

The difficulty with M33 is that the core is far brighter than the rest of the object. This means that to ring out the detail is common for the core to be burnt out.

Try adjusting the histogram so the curve slopes to the right rather than ending at a cliff. That should prevent the saturation of the pixels in the core.