Celestron Nexstar SE Mount Qs (6/8 version)
Posted 10 December 2010 - 12:09 PM
From time to time I get the hankering for a reasonable quality alt-az GOTO mount capable of carrying a variety of lighter weight payloads. Each time my mind wanders down this path, I eventually stumble on the Nexstar SE mount (the version for the 6"/8" OTAs, not its smaller cousin).
Here's the thing, though. Most of my smaller scopes are refractors. They run the gammut from a Takahashi FS-78 and TV-102 to a handful of vintage achromats (80mm f/11.4, 60mm f/15, etc.).
I realize that this mount was designed with a stubby, fat catadioptric OTA in mind, but with reasonable care do you think that such a mount would be suitable for the refractors I list? Does it have settable limits or would I need to manually monitor altitude position to avoid colliding the focuser with the base? Any other obvious or not-so-obvious issues I should consider?
Posted 10 December 2010 - 12:37 PM
You can counterweight your refractors so that they clear the base, but you want to make sure you don't exceed about 12lbs.
All in all, I've been successful with an 80mm f/7 refractor, but that's about it.
I'd go to the MiniTower, rather than the NexStar. I have both, and the MiniTower gets as much use as my CPC. The flexibility of OTA mounting options is just that much superior to the SE mount.
I know folks have reported issues with MTs. Other than the GPS starting out a little wonky, everything on mine has worked perfectly.
Posted 10 December 2010 - 02:36 PM
Maybe I'll just continue to flog my very tired, battle scarred CG5-GT as my quick set-up GOTO mount for now.
Posted 10 December 2010 - 07:52 PM
Posted 11 December 2010 - 11:18 AM
Posted 06 January 2011 - 07:47 PM
Both upper and lower limits...
Posted 07 January 2011 - 02:17 PM
I set slew limits to 60 degrees to avoid collision with tripod on gotos, but you still have to be careful moving it manually since slew limits only relate to gotos.
If you can live with altitude limits like that, longer lighter refractors might be used, as all stars are less than 60 degrees high at some point while rising or setting.
Posted 07 January 2011 - 06:00 PM
Posted 07 January 2011 - 11:46 PM
Posted 08 January 2011 - 06:48 AM
The Celestron NexStar Wedge, designed for both the 6SE and 8SE (and other earlier models, too), now does appear discontinued by Celestron.
Not sure what alternatives exist from Celestron though - perhaps a quick reaching out to them to find out might be in order..,
Posted 08 January 2011 - 08:06 AM
Posted 08 January 2011 - 09:56 AM
The Celestron Heavy Duty Wedge #93664 will fit the 6/8 SE mount, but it's pricey.