Planetary with TOA130 and Barlow help.
Posted 02 July 2013 - 10:16 PM
My plan is to use the Tak TOA130 with a barlow to get a decent focal length. I was thinking a 3x barlow should give me an acceptable magnification but I am not sure.
Does anyone have any suggestion about a good barlow that will not introduce CA? I know next to nothing about barlow lenses.
Is my plan just so flawed that I shouldn't even try? I think most people use SCT's or very long refractors for planets.
Thanks in advance!
Posted 02 July 2013 - 11:45 PM
Posted 03 July 2013 - 10:42 AM
I will look for the same Barlow. Good reminder about UV/IR cut. I think I have one of those filters.
Posted 03 July 2013 - 12:04 PM
Posted 03 July 2013 - 01:12 PM
we don't get very good seeing but I noticed that it varies a lot even within a few miles.