|
looks like poor seeing to me, but nothing embarrassing at all. Ease of focusing is a good indicator of seeing - if it is hard to focus, the image will be ordinary. As Andrew points out, the scope must also be in thermal equilibrium with the air or you will get boiling of the image from tube currents and boundary layers in addition to the seeing effects.
FWIW, I use the appearance of fine detail in the image (if there is any) to focus and just wait long enough at each setting to make sure I get a good sample of seeing to decide if it needs tweaking. Be thankful you are using a colour cam - with mono you have to do it 3 times for each image.
I suspect that everyone has hard disks full of useless images taken in poor seeing.
Regards Ray
Last edited by Shiraz; 26-03-2012 at 08:38 AM.
|