Image of the day

Captured by
Arthur DuBois

nice warm sun

My Account

New to Astromart?

Register an account...

Need Help?

Takahashi FS60CB: finally in focus with everything

Started by Fedeledemarco, 03/24/2022 11:41PM
Posted 03/24/2022 11:41PM Opening Post
I recently bought an FS60CB and I immediately ran into the known problems of backfocus and short focuser.
The use I have to make of the telescope involves the use of heavy and accessorie very demanding  in terms of backfocus: solar observations with Quark+ turret, Diagonals of 2", Baader cool Ceramic 2 "+ turret, etc ....
The definitive solution I found, which solves the focus problems with all this in a SAFE and STABLE way, was to mount an FTF 2025 BCR (which I had from the previous FC100DL). But not with the dedicated SI flange, as it takes up space and in the end the system is 7.5 cm long as with the original fok.
Therefore I had a flange made here in Italy, by the "Officine Otttiche e Meccaniche COMA di Adriano Lolli", which:
- was ultrashort
- that guarantees solidity to heavy optical trains without bending
- that he did not do vignetting
Lolli has created this magnificent flange which at the moment still has to be anodized in the same color as the focuser.
To give you an idea of the system, I go into focus with Maxbright II turret + T2 32 Baader + 2 "nose (total backfocus 148 mm) and there is still 22 mm of travel left, and this WITH NO GPC!

Attached Image:

Fedeledemarco's attachment for post 188087