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Old 08-07-2007, 01:11 PM
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matt
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Location: Launceston, Australia
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Quote:
Originally Posted by g__day View Post
Strongly suggest you read the first post here, ranking and comparing goto mounts:

http://www.iceinspace.com.au/forum/s...ead.php?t=8135

The CGE is more modern than the G11 + Gemini alternative, but the G11 has better gears - hence better tracking and pointing ability.

The CGE will carry more load, and is more rugged and fool proof and has clean uncluttered lines, it just seems to need enough current to run well. The G11 has a great reputation, but I hear (second hand) of burning out motors if it wasn't balanced well on set-up.

The CGE's pointing ability may improve 300% with a supercharge - implying their quality control is severely lacking from the factory - hence its ordinary PE - barely surpassing an EQ6 - from the factory (+/14 RMS arc/secs vs about +/-22 arc/secs for the EQ6).

For good astrophotography with a large SCT you need a really impressive mount. Periodic Error in the worm drive can be estimated by the research done here

http://demeautis.christophe.free.fr/ep/pe.htm

If you're interested in the gears various mounts use - and that is critically important consider this data on many mounts that support PEC

http://www.siriusimaging.com/Help/PE...Equiipment.htm

I strongly suggest you research more before you buy. You want fit for purpose and you need to know more to get the maximum out of your budget.
I'm guessing you have a CGE?

Some food for thought there, though. I'll most likely be replacing my EQ6 quite soon.

Will be looking for a bigger and more accurate unit for imaging with a much heavier OTA than the 9.25.
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