Quote:
Originally Posted by Allan_L
Hi john,
Welcome to IceInSpace 
(from a fellow bean-counter).
Your current scope 150mm aperture 750mm focal length 10mm eyepiece will be giving you approximately 75 times magnification with a true field of view of about .67 of a degree ( or 40 arc minutes). [assuming a plossl with 50 degree apparent field of view].
With that setup, you could add a 2 times barlow and get a satisfying 150 magnification, and your field of view is halved to about .33 of degree.
Any further magnification may not be so satisfying.
Problem is, with a shaky mount the wobbles will be amplified and the target will pass through the field of view pretty quickly.
Not to mention atmosphere instability probably means you get a larger image but not clearly defined.
I mainly use Televue eyepieces (circa $450 and up), but there are a lot of people here who use more economical brands and claim as good results. |
Is there anything I can do to sure up the mount?
Once I get a decent Barlow or Powermate. I guess I'll need to buy a couple of decent EP's to open up that FOV a bit.