Orion Atlas w/ go-to upgrade vs. "original" go-to
Posted 02 April 2009 - 01:39 PM
that an Atlas that was a go-to model from the start, or are the two versions pretty much equivalent?
Thanks in advance,
Posted 02 April 2009 - 02:39 PM
I asked this same question many months ago. That was the answer I got.
Posted 02 April 2009 - 02:59 PM
Posted 02 April 2009 - 03:07 PM
Posted 02 April 2009 - 04:09 PM
If it were me, I would want to get one that is newer rather than older.
Other variations over time are the reticle and calibration scales for the polar finder. Also, the older models do not have a polar reticle illuminator and the upgrade kit does not include one.
Having said all that, I am still very happy with my mount.
Posted 02 April 2009 - 05:18 PM
Posted 02 April 2009 - 05:34 PM
Good point, Jeff. I'll bet you're right.
One thing I have never seen addressed is the quality of the components common to all models. In particular, worms and worm wheels. I suspect that the quality has improved over time.
Posted 03 April 2009 - 07:25 AM
By "original go-to" I meant a mount that comes packaged from the factory with go-to, as opposed to a go-to option that is added on at a later date as an upgrade. Sorry if my wording was confusing.
Don't know what the "original GOTO" means.
Posted 03 April 2009 - 08:49 AM
ccs_hello: At one time, the difference between non-goto and goto was contgroller board on the mount, drive motors, and hand controller, which contains the computer. Presently, the only difference is the hand controller.
The motors and controller board made a HUGE difference for me. It transformed my mount from a visual to a photgraphic mount.
I did upgrade bearings, reset the RA worm mesh with new spacers, and relubed. Using the Orion autoguider, I did a guiding test the other night and got an average +/- 0.51 arc sec over 4 hours. One more teardown to set the Dec mesh and I expect to be set for a very long time.
Posted 03 April 2009 - 12:04 PM
That's a pritty good result!
Did you run PEC also at the same time??
Maybe you'd want to try another guiding program
called Metaguide, also for free!
I've got average PE-error over 11 cycles of
Anyway, it's not a big difference, since seeing
and FWHM are much worse where I'm located
Posted 03 April 2009 - 02:15 PM
WOW!!! That's better than many of the "premium" mounts. Was the rebuild difficult to do?
I did a guiding test the other night and got an average +/- 0.51 arc sec over 4 hours.
Posted 04 April 2009 - 12:28 PM
My stock EQ6 had a peak PE of +/- 40 arc seconds. I have torn it down several times. Now I had a peak PE +2.37 and - 2.74 arc sec. The max correction was 2.92 arc sec. Seeing was poor and there was a bit of a breeze, too. I am pretty sure there are "wind events" in the data, as the numbers do change if I trim down the dataset.
Mert: I used PHD for guiding. I have EQMOD set up and want to try PEC and the variable speed thing. I do want to check out MetaGuide, too. Thanks for the tip! Please see my other thread regarding transfer gear tooth noise.