Replacement focuser

TS-Optics PHOTON 150mm/6" f/4 Newtonian Focuser
7 replies•222 views
D. Jung avatar
D. Jung avatar
Has anyone replaced the monorail focuser on the TS Photon? Mine keeps slipping and I want to get a better one, but most focuser seem to be done for 8inch and above.

This one here seems to be able to be attached to this scope:
https://www.teleskop-express.de/en/telescope-accessories-5/focusers-adapters-motorfocus-296/focusers-and-micro-transmission-92/ts-optics-2-inch-rack-and-pinion-focuser-with-additional-thread-for-accessories-up-to-5-kg-15797
with this adapter
https://www.teleskop-express.de/en/telescope-accessories-5/focusers-adapters-motorfocus-296/focuser-telescope-attachment-297/ts-optics-adapter-to-ring-dovetail-from-gso-ts-photon-for-the-rap2del-focuser-15803

Any experiences or other recommendations?
andrea tasselli avatar
andrea tasselli avatar
I guess it is the only game in town and I researched it long and wide. I really hate that focuser!
D. Jung avatar
D. Jung avatar
andrea tasselli:
I guess it is the only game in town and I researched it long and wide. I really hate that focuser!

So you replaced the monorail focuser with this one? Why do you hate it? What is the problem with it?
Tobiasz avatar
Tobiasz avatar
Maybe the UNCG2 might be also an option. I use it on my Carbon Photon 6 Inch f/4 Newton. Link

Rigid and useful with the internal M54 thread.
andrea tasselli avatar
andrea tasselli avatar
D. Jung:
So you replaced the monorail focuser with this one? Why do you hate it? What is the problem with it?


I should have be clearer; I hate the original one and I didn't replace it yet as I can't really stomach the cost but I might have to swallow the bitter pill one day soon.
andrea tasselli avatar
andrea tasselli avatar
Tobiasz:
Maybe the UNCG2 might be also an option. I use it on my Carbon Photon 6 Inch f/4 Newton. Link

Rigid and useful with the internal M54 thread.

*I have the metal one so not sure they are the same but is it a drop in replacement?
D. Jung avatar
D. Jung avatar
andrea tasselli:
Tobiasz:
Maybe the UNCG2 might be also an option. I use it on my Carbon Photon 6 Inch f/4 Newton. Link

Rigid and useful with the internal M54 thread.

*I have the metal one so not sure they are the same but is it a drop in replacement?

Wondering the same. In the description it says only for 8 inch and above, but the 6 inch carbon version comes equipped with this one. Cost about the same as the one I listed.
Tobiasz avatar
Tobiasz avatar
andrea tasselli:
Tobiasz:
Maybe the UNCG2 might be also an option. I use it on my Carbon Photon 6 Inch f/4 Newton. Link

Rigid and useful with the internal M54 thread.

*I have the metal one so not sure they are the same but is it a drop in replacement?

I was in contact with TS before I ordered the Carbon Photon, so they changed the focuser before they shipped the telescope to me, but they had to use another base. 

Link

but they told me its plug and play, because the hole placements for the screws are the same as GSO. Just the UNCG2 and the base and you're good to go. 

But beware of EAF placement, because this is a downside with this focuser. You only have one screw to secure the EAF and your bracket has to be long. I bought a cheap L bracket from Aliexpress and with this one it works. 

Link

FYI: I got the RAP2DEL recommended from TS first, but decided on the UNCG2 because I needed the lower focuser height for backfocus reasons (Rotator, OAG, FW, Camera). What is a plus, I could use my photon with the more extreme 0.73x reducer now but I will stay at f/4.

Btw. I have a TS Photon Carbon Generation 2.
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