Alt-Az for TOA-150?
Posted 26 July 2009 - 08:06 PM
Posted 26 July 2009 - 08:33 PM
For visual, I find it quite a process to setup my CGE. For star parties, the extreme height changes of the eyepiece at horizon vs zenith is pretty bad. I'd love to find an affordable Alt/Az with goto setup to swap it out for that could handle the TOA-150. Does anyone have any suggestions?
Go for DiscMounts DM-6 on G11 tripod. That's what I use with 6" f/8 refractor.
Posted 26 July 2009 - 08:41 PM
Posted 26 July 2009 - 08:51 PM
Posted 26 July 2009 - 08:55 PM
Posted 26 July 2009 - 09:21 PM
You'll see 7" f/8, TOA150 there. If tripod is robust, I think DM-6 can handle TOA150 f/7.3. I think you can avoid using weight band (4.8Kg extra) if you use long dovetail plate instead.
My system (WO FLT 152 f/8, 45lb) is lighter and longer than TOA150. I feel very secure on DM-6/G11 FHD tripod.
Posted 26 July 2009 - 09:30 PM
Posted 26 July 2009 - 10:03 PM
Is DM-6 extender/adapter to Tak metal tripod made by Tom Peters?
I am considering to buy a new Tak metal tripod (announced on April 16th 2009).
Posted 26 July 2009 - 10:51 PM
Also with all that weight (i.e., TOA 130) off to the side on the DM-6 I was nervous about tipping without a lot of tripod leg spread, which then interfered with reaching zenith (but extension column or pier would help avoid this).
This is a personal opinion/decision of course but I really view a beefy Alt/Az and OTA like the AP140 I currently own only marginally less trouble to deal with than the same OTA on a quality GEM. Again, in my own opinion, the latter is also more pleasurable to use with such a scope but YMMV. I now pretty much restrict my Alt/Az viewing to ~4" or smaller scopes with a high quality Alt/Az mount. I happen to use a Half-Hitch but I'm sure I would be very pleased with a DM-4. The DM-6 was/is a wonderful mount but I ended up letting it go because of the weight and as mentioned, preference for using a GEM with a heavy OTA.