Upgrading the focuser on an 8" RC

Focuser
Ritchey Chretien telescopes GSO Family •3 replies•148 views
Flemming Kristensen avatar
Flemming Kristensen avatar
This otherwise fine and popular scope's weakest link is its focuser, I think.
After a lot of problems I decided to upgrade to a much better focuser from Baader Planetarium. I have documented the process in a video where I also show how you can align the focuser perfectly with the optical axis of the primary mirror. 
If you are interested you may find the video here: https://youtu.be/1logCewVcpI

Best regards,
Flemming
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Gustav Lundby avatar
Gustav Lundby avatar
Luckily I did see this problem before buying and managed to make vendor do the swap against the cost difference.
I got the Teleskop-Express: TS-Optics 2,5" Zahntrieb Okularauszug mit M90x1 Anschluss und 360° Rotation . It allows me to place the flattener/reducer inside the focuser.  I did not have to correct the direction of the focuser. I have a M90 tilt in front, but have not had to adjust it.
Flemming Kristensen avatar
Flemming Kristensen avatar
Gustav Lundby:
Luckily I did see this problem before buying and managed to make vendor do the swap against the cost difference.
I got the Teleskop-Express: TS-Optics 2,5" Zahntrieb Okularauszug mit M90x1 Anschluss und 360° Rotation . It allows me to place the flattener/reducer inside the focuser.  I did not have to correct the direction of the focuser. I have a M90 tilt in front, but have not had to adjust it.

Yes, that is also an ok focuser. It is mechanically identical to the one I have on my 94mm EDPH refractor, and works fine. It does feel a little bit springy, though, and not quite as responsive as the Diamond Steeltrack. That's fair enough considering the price difference.
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Jamie avatar
Jamie avatar
Flemming Kristensen:
I got the Teleskop-Express: TS-Optics 2,5" Zahntrieb Okularauszug mit M90x1 Anschluss und 360° Rotation .


That's the same one I got for my TPO RC6 and love it.
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