some questions about the lx90 10" fork mount.
Posted 07 July 2014 - 01:40 AM
Posted 07 July 2014 - 09:05 AM
Although I have the LX90 8 inch, there are many similarities.
Here is what I am familiar with:
1.There are two clutches (RA and DEC).
2. You should level it whether in ALT/AZ or Polar (unless you have the LNT module).
3. Under normal use (without the guiding accessories) the batteries should last for several lengthy evenings (varies by ambient temp and load).
Most owners use an external power tank, or car battery adapter, or an AC/DC converter, when at home.
4. The issues I am familiar with are for the 8 inch, but could appear in the 10 inch:
A. Bad motor control boards in DEC and/or RA, causing thumping, clicking and jumpy views.
B. Poorer lengthy polar tracking vs. the LX200
C. Possible image shift, when focusing.
D. A rarer occurrence is Primary mirror shift when slewing to different parts of the sky. This can throw off the collimation.
If you put an LX200 (or LX90) on a dolly (I made one, for my LX90, with levelers), then the extra weight (at home) should not be as much of a concern. Also, with a dolly, for traveling to dark sites, see what options are available for a quick removal of the mount/wedge, from the tripod.
Of course consider the higher price for the LX200. It usually is worth the additional, price if you are going to do long exposure imaging. I have seen exceptional results, though online, for both.
When you get more questions, post here or on the respective Yahoo Group forum(s).
Best of luck and dark skies. Fivel
Posted 07 July 2014 - 10:31 AM
Posted 08 July 2014 - 03:20 PM
FWIW, I had and LX90 and it suffered from none of those issues. Perhaps I just had a good one. The LX90 is a heck of a bargain for the 8 and 10" models. But, having said that, if I were in the market for an SCT I would take a hard look at the Celestron 9.25 Evolution. It has a newly designed gearbox and comes with some high tech features like wifi and a built in lithium rechargable battery.
Posted 15 July 2014 - 04:09 AM