[SkyWatch (Dean)]

Hi again!

If you have tried the 40mm with the reducer that is as big as you will get with your scope: about 40 arc-minutes. The true FOV is limited by the filed-stop diameter of the eyepiece. You will get a bigger field with a 2" visual back, but you might get some vignetting with the wider field eyepieces.

If you are getting concentric rings with de-focussed images then your collimation should be OK. I wouldn't fiddle with that unless you know exactly what you are doing.

I can't understand why M22 isn't jumping out at you unless it simply isn't in your FOV: it looks terrific in my CPC800, which is smaller than yours. Have you tried Omega Centauri or 47 Tuc for comparison?

All the best,

Dean

PS: Just had a thought- the objects you are talking about are all pretty high up in the evening this time of year, and it doesn't take much of an error in the go-to drive for it to make a big difference when looking overhead. Make sure your initial set-up is spot on (do the 3-star alignment if possible), and then go-to a nearby bright star, like Antares, and re-set the go-to alignment. That might help ensure the objects are in the fov.