Quote:
Originally Posted by kinetic
Trev,
nice work and a great example of your efforts!
I wonder if the boundary layer/ cooling thing would
also apply to long exposure deep sky stuff too? 
Thanks for sharing the research Trev, inspiring!
Steve |
Thanks Steve,
The instability of the boundary layer of air across the primary mirror is most apparent with planetary imaging due to the very high magnifications most imagers are using. The high magnification also magnifies this disturbance of the boundary layer. At low mag, prime focus with a DSLR or similar it wouldn't be as big a problem, that said, considering some of the higher mag deep sky work that you have been doing, it might help. The results at high mag really are significantly better with the mirror within +- .5 C of ambient.
Regards
Trevor