Barlow imaging with RCX
- I have been doing some planetary imaging with my 12" RCX400 and using a
Barlow to increase the resolution. Using a variable Barlow, the maximum
factor is 3.0x giving f24. Most articles that I read on planetary
imaging suggest using f25 as a minimum. I've been moderately pleased
with the results given the seeing conditions which seem to be very
limited. If I try re-collimating, I am wondering whether I can do it at
f8 rather than searching for a bright star at f24! Interestingly I did
develop a method to find objects at f24. It involves using a wide field
CCD and then substituting the narrow field 'web' camera when the object
is centred. Only the focus needs changing then.
Comments on using Barlows with the f8 would be most welcome.