HELP .. Optical prob. with Megrez 80 SD ??
- Hello everybody,
I use a megrez 80 SD and a canon 300D for imaging.
I've noticed a big coma (spherical aberation).
I'd like to know if someone have the same problem, I'm afraid it
could be a defect of the scope.
I precise that I use a filter LPR (Orion skyglow), but it should not
exagerate the come, no ?
You will find an example of the rosette nebula :
and others at : http://astrosurf.com/lacote/Images/cielprofond/300D
I've ordered a field flattener 0.8x form Televue, hoping it will
resolve a little..
Does anyone can advise me ?? thank's a lot :-)))