Author Topic: Looking for your Input on a Mount  (Read 15 times)

postbypopect

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Looking for your Input on a Mount
« on: December 27, 2017, 10:36:12 AM »
So far my research has lead me the Orion Atlas EQ-G Computerized GoTo Telescope Mount on which I intend to mount an Astro-Tech AT115EDT f/7 ED Triplet Refractor OTA along with an auto guider, guide scope and DSLR. I am leaning toward this mainly for use in Astro Photography and it seems to have all of the specifications that would lead me to believe it would be a good stable Platform. I would like any input pro or con. I have not spent a dime yet so I am still in the investigation stage.



exmartata

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Re: Looking for your Input on a Mount
« Reply #1 on: December 27, 2017, 03:30:05 PM »
My guess is that you're going to get a lot of suggestions to back down on the scope to something with a FL less than 500mm or so. Your equipment list is going to be potentially very heavy and likely will be more than the 20 pounds or so for imaging.

noerivatat

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Re: Looking for your Input on a Mount
« Reply #2 on: December 28, 2017, 11:43:17 PM »
13lb scope. You'd have to work hard to over load.

You'll get recommendation to consider the EQ6-R which is an upgraded belt driven version of the same mount.

I see no reason to go for shorter focal length, provided you aren't OCD about perfection from the get go. A 500mm FL mask a lot of issues so you will likely get better result from the start if that's your preference.

Some folks here only consider perfection to be worth "Shooting for" (hehe). When most of the images even modest equipment today can do exceeds what can be done by large professional observatories just a decade or two ago.

Chris Harwood

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Re: Looking for your Input on a Mount
« Reply #3 on: December 29, 2017, 04:36:41 AM »
My OTA is 12 lbs "bare". The list of equipment he has is identicalto mine.

My total load is 33 pounds which is likely too much for the Atlas photographically.

Michael Zamora

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Re: Looking for your Input on a Mount
« Reply #4 on: January 03, 2018, 04:33:24 PM »
Or you could do what everyone of us wish we could have done. Max out the visa on a Paramount ME2, a FSQ130 takahashi on it and a qsi623m. After that there is very little reason to ever think of upgrading.

After you quit imagining that shiny red mount, maybe a CEM60 with a 80-110mm stellarvue. At 4k its not a bad imaging rig.

rennlispuring

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Re: Looking for your Input on a Mount
« Reply #5 on: January 08, 2018, 12:29:10 AM »
Jmo. Too many variables to state it definitely, so I didn't.

My payload was too much for my CGEM and AZ/EQ-G. That's a fact, so my post was more one of precaution that anything else.

unoritvie

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Re: Looking for your Input on a Mount
« Reply #6 on: January 08, 2018, 02:56:47 PM »
If AP is going to be your primary use put your money into the mount. The Atlas may be capable however it’s fairly common knowledge that on many mounts you should only put 50% of it rated capacity on it for AP work. If you think it will be above that adjust your thoughts to get a higher quality mount such as a Losmandy or if you have the budget a premium quality mount that can easily handle the rated capacity for AP work.

If you think the load will be less than 20lbs yup an Atlas should be okay. If it goes above that then continue saving for a better mount.

caenalfosen

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Re: Looking for your Input on a Mount
« Reply #7 on: January 08, 2018, 05:51:58 PM »
Look at the Losmandy GM811HD

grumepinod

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Re: Looking for your Input on a Mount
« Reply #8 on: January 10, 2018, 08:56:41 AM »
Plus 1 on the GM811G (not sure what Richard meant by GM811HD). You can find them at:

http://www.losmandy.com/gm811g.html

Omar Manning

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Re: Looking for your Input on a Mount
« Reply #9 on: January 15, 2018, 02:42:20 PM »
Quote
Quote

So you are telling people it is likely too much but it sounds like you don't know for sure?
A 14lb edge 8 plus camera, guider etc works just fine with my ieq45 pro. 0.8 RMS is possible using a guide scope. Moving to OAG soon.
Don't know why folks seems to think some hard 1/2 rule has to be in play.
Many examples of es 127 triplet on eq6 can be found. It works well enough for that scope.

Folks don't think a RULE is in play.

Folks think that they shouldn't give advice that is in effect a gamble on getting an above-average copy of a mount, plus will require significant expertise for achieving decent results. Especially when there's little benefit on getting a 115mm vs. a 90 or 100mm scope. This is not visual. The same exact mount will always track steadier with a lighter load, which will compensate very nicely for the reduction of aperture and F/L.
Actually, the original post specifically said 20 lb for imaging. So, if people are not saying there's a rule then why say that?

Also, I'd venture to say that actually people do very much seem to think that is a rule. How many "what mount" thread becomes a well you should buy all the way up the scale of costs, get a 80mm... ? The 3 dots being well if you are spending say 9k on a premium mount and then only buying a 80mm when will you buy anything that actually needs that premium mount?

What I wanted to say is it can work. And the real measuring stick is your own expectations. If you want perfection you should be prepared to take out a loan (for most folks). If you can live with binning and reducing your image resolution actually a lot of different setup can do well enough.

Finally, is the EQ6 really not capable of mounting a 115-127mm triplet? Seems it works well enough for a lot of folks on astrobin so why suddenly no you have to go up another class of mount?

Over and over the people who post to this forum, are some of the best marketing folks for the vendors who make higher class mounts. We should be getting some sort of SWAG for all the business directed at those vendors over the months and years.

John Fimbres

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Re: Looking for your Input on a Mount
« Reply #10 on: January 15, 2018, 09:29:55 PM »
Quote
Plus 1 on the GM811G (not sure what Richard meant by GM811HD). You can find them at:

http://www.losmandy.com/gm811g.html

I am looking now at the Losmandy Gemini II, I think the HD is the tripod included version.

Alan