robin, i don't have one but when i looked at buying one was told it was 1.25" unless you upgraded the focuser..seems the TV60 has that advantage..but i may be wrong
There isn't one on the adapter chart but I should be able to get something made up although it has some odd threads. It's M55.9 out of the focuser down to M52 out of the Aux Ring then M43 and M36 after the visual adapter. I've seen a 2" ocular to M42 female around so maybe something can be done with that? At least it comes with a 1.25 ocular out of the box
I used a Sky90 50.8mm adapter (TKP35110) which screws onto the FS60-C focuser draw tube directly, or via the CAA which I use.
I then removed about a centimetre off the end of a standard Bintel 2" Quartz Dielectric diagonal so that it had enough in-focus with the CAA fitted. Works a treat, and clear 2" aperture right the way through. The two collar screws on the adapter secure the short diagonal tube very snugly, and the CAA lets you observe with the EP at the optimal angle.
