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Old 09-07-2019, 05:04 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,825
Quote:
Originally Posted by AstroApprentice View Post
Hi Dennis,
There is too much mirror shift on my old u-210 to use the stock focuser when imaging or to bother to motorise it. I replaced the visual back adapter with a custom lower profile one and added a low profile Crayford focuser and motorised that. There’s a very long thread on CN that discusses this:
https://www.cloudynights.com/topic/5...10-yes/page-15
IMO, that’s the way to go.
Thanks Jason, all very helpful and thanks for the link to CN, I'll take a peek.

The standard Tak OEM 2" Adapter takes up just over 50mm of back focus and I just removed it and replaced it with my JMI EV Motorised Focuser (from my C9.25) and it takes up some 75mm, which pushes me way beyond the Tak recommendation of 105-118mm with FW and Camera fitted.

Hmm, decisions, decisions...

Cheers

Dennis
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