I'm looking for an explanation that really reveals to my pea brain why a long focal length telescope will be more challenged in poor seeing. Maybe an article that lays it out...maybe someone here can say it... :S
Focal length and atmosphere
Started by earthstar, 08/05/2008 04:19AM
Posted 08/05/2008 04:19AM
Opening Post
Posted 08/05/2008 06:14AM
#1
The more you magnify the movement of air (poor seeing), the more you will see the shaking and shimmering. (The more you magnify any defect, the more you will see it.)
Longer focal length telescopes magnify more than shorter focal length telescopes.
Therefore, you see the errors more in a longer focal length.
Alex
Longer focal length telescopes magnify more than shorter focal length telescopes.
Therefore, you see the errors more in a longer focal length.
Alex
Posted 08/06/2008 01:35AM
| Edited 08/06/2008 01:36AM
#2
So what I'm hearing here is that two scopes of equal aperature set up for the same magnification, both focused accurately, differing only in focal length will NOT have a different presentation of the turbulence in the atmosphere. Ya? Y'all agree with that statement?
