Quote:
Originally Posted by Peter Ward
Having spent the last 30 years operating airliners in the tropopause I’m fairly familiar with how density decreases with altitude 
(interestingly, if a turbofan could still produce the same thrust at altitude as it does as sea level, there would be enough thrust there to get to orbit)
I digress, adding extra image abberation in by pointing an optical system vertically doesn’t change the system’s intrinsic resolution. It all still goes south from the starting datum..... |
For the record, I'm converted and saving for the biggest telescope my current mount can handle. One beautiful day, it will be either a fast 10" Newton or a 10" RC.