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Equipment Discussions >> Mounts

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Jeff55
professor emeritus


Reged: 04/14/05

Loc: Boston MA
Weight of Loads On CGEM
      #3608966 - 02/06/10 04:51 PM

I'm curious to get a sense of the amount of weight being carried on these mounts...mine has 34 pounds which it is carrying without a problem...note that I'm strictly a visual observer.

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DaemonGPF
Redonkulous
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Reged: 03/22/08

Loc: Aurora Colorado
Re: Weight of Loads On CGEM new [Re: Jeff55]
      #3608981 - 02/06/10 04:58 PM

There's people out there buying the Edge HD 11 package.. so theres at least 28 lbs up top on those setups. I'd guess for visual it would be fine. I cringe to see how someone's imaging struggles with that kind of configuration turns out. Long focal length, heavy OTA, add on some cameras and maybe a guidescope, filter wheel, etc etc etc, I bet the weight is up there. I suspect it doesn't do too well in that scenario.

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Fred1
Carpal Tunnel
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Reged: 09/19/07

Loc: Somewhere in the Orion Spur
Re: Weight of Loads On CGEM new [Re: DaemonGPF]
      #3609263 - 02/06/10 07:34 PM

I'm carrying 39.5 lbs on my CGEM. NO problems. I'm all visual.
BTW, my local scope shop weighed my EdgeHD 11" OTA with dovetail on a shipping scale. It read 29.84 lbs.
Just the dovetail is 2.4 lbs.

Edited by Fred1 (02/06/10 07:36 PM)


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DaemonGPF
Redonkulous
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Reged: 03/22/08

Loc: Aurora Colorado
Re: Weight of Loads On CGEM new [Re: Fred1]
      #3609322 - 02/06/10 08:02 PM

Anyone imaging on a CGEM with this much weight? I'm curious.

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SanDiegoPaul
Carpal Tunnel
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Reged: 07/22/05

Loc: San Diego
Re: Weight of Loads On CGEM new [Re: DaemonGPF]
      #3609744 - 02/07/10 12:43 AM

Quote:

Anyone imaging on a CGEM with this much weight? I'm curious.




Well, they say to image with only half the mount's capacity. That would put these mounts with a 20# payload for imaging purposes.

I wish I could use it for my Lx200 but I'm not going to try imaging that way. I am just using the APO on the mount for now, even though the mount is overkill for a small 6# refractor!


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galacticphoto
super member


Reged: 11/12/09

Loc: Huntsville, AL and Atlanta, Ga
Re: Weight of Loads On CGEM new [Re: SanDiegoPaul]
      #3610090 - 02/07/10 08:52 AM

Quote:

... they say to image with only half the mount's capacity... even though the mount is overkill for a small 6# refractor!




If you consistently see tight round stars in your (5 or 10 minute)exposures, the mount is carrying its load w/o problem. If not, time to put it on a diet, or look for a bigger mount.

If the go-tos are good, and the motors aren't overtaxed, the load for visual work is probably ok.

Robert


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nemo129
Post Laureate
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Reged: 01/03/10

Loc: WMass
Re: Weight of Loads On CGEM new [Re: Fred1]
      #3610284 - 02/07/10 10:55 AM

Quote:

I'm carrying 39.5 lbs on my CGEM. NO problems. I'm all visual.
BTW, my local scope shop weighed my EdgeHD 11" OTA with dovetail on a shipping scale. It read 29.84 lbs.
Just the dovetail is 2.4 lbs.




Yup, then you add the star diagonal..perhaps the handgrenade sized Axion LX EP, the spotting scope, telrad...or red dot finder of choice, and an extra weight to get the OTA to balance in declination...and this thing gets heavy! I would not dare attempt any AP on this guy, as I would give up in frustration . In the next budget cycle I plan to pick up an 80-100mm APO refractor (hopefully used!) and start with my unmodded DSLR. I think Paul has it right, the CGEM will work great on a lightweight scope. Remember there is no such thing as overmounting a scope for AP!


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SanDiegoPaul
Carpal Tunnel
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Reged: 07/22/05

Loc: San Diego
Re: Weight of Loads On CGEM new [Re: nemo129]
      #3610933 - 02/07/10 04:20 PM

Quote:

I think Paul has it right, the CGEM will work great on a lightweight scope. Remember there is no such thing as overmounting a scope for AP!




Yep that is the EXACT premise I based my purchase decision on. When I can afford a bigger mount & I am ready to take my Lx200-10" off it's fork, then I will consider one just for that. But for now, the price of the CGEM was comfortable for me (thankfully) and it will hold a much larger refractor than my Raptor-90. So I have plenty of room left to grow and still maintain the ability to image, which is my major interest.


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DaemonGPF
Redonkulous
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Reged: 03/22/08

Loc: Aurora Colorado
Re: Weight of Loads On CGEM new [Re: SanDiegoPaul]
      #3611033 - 02/07/10 05:01 PM

Maybe... but I'd bet everyone would laugh at the sight of a $300 AT66 mounted on top of a Paramount ME @ $14,500. I would consider that a good case of over-mounting.

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nemo129
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Reged: 01/03/10

Loc: WMass
Re: Weight of Loads On CGEM new [Re: DaemonGPF]
      #3611079 - 02/07/10 05:18 PM

Hmmm..maybe so...but it would just give you an real good excuse to upgrade your OTA! Unless the Paramount ME at $14.5K wiped you out!! If you could afford that mount..I don't think you are worrying about cost of a bigger OTA!
Clear Skies!


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DaemonGPF
Redonkulous
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Reged: 03/22/08

Loc: Aurora Colorado
Re: Weight of Loads On CGEM new [Re: nemo129]
      #3611150 - 02/07/10 05:42 PM

Quote:

Hmmm..maybe so...but it would just give you an real good excuse to upgrade your OTA! Unless the Paramount ME at $14.5K wiped you out!! If you could afford that mount..I don't think you are worrying about cost of a bigger OTA!
Clear Skies!




The real question is could my relationship afford it? My wife would never see me again if I had a Paramount. I'd live outside for two reasons. 1) She'd throw me out there for dropping that kind of cash on a hobby she has no interest in, and 2) because I'd never want to come back in anyway.


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SanDiegoPaul
Carpal Tunnel
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Reged: 07/22/05

Loc: San Diego
Re: Weight of Loads On CGEM new [Re: DaemonGPF]
      #3611951 - 02/08/10 01:49 AM

Quote:

Quote:

Hmmm..maybe so...but it would just give you an real good excuse to upgrade your OTA! Unless the Paramount ME at $14.5K wiped you out!! If you could afford that mount..I don't think you are worrying about cost of a bigger OTA!
Clear Skies!




Hmmm. But remember there are just ~some~things~ that a ParaMount cannot do for you
The real question is could my relationship afford it? My wife would never see me again if I had a Paramount. I'd live outside for two reasons. 1) She'd throw me out there for dropping that kind of cash on a hobby she has no interest in, and 2) because I'd never want to come back in anyway.





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DaemonGPF
Redonkulous
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Reged: 03/22/08

Loc: Aurora Colorado
Re: Weight of Loads On CGEM new [Re: SanDiegoPaul]
      #3612179 - 02/08/10 08:30 AM

LOL!

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nemo129
Post Laureate
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Reged: 01/03/10

Loc: WMass
Re: Weight of Loads On CGEM new [Re: SanDiegoPaul]
      #3613409 - 02/08/10 07:23 PM

Quote:

[Hmmm. But remember there are just ~some~things~ that a ParaMount cannot do for you
The real question is could my relationship afford it? My wife would never see me again if I had a Paramount. I'd live outside for two reasons. 1) She'd throw me out there for dropping that kind of cash on a hobby she has no interest in, and 2) because I'd never want to come back in anyway.






Thanks! I needed a good chuckle like that at the end of a miserable Monday!


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George Methvin
Pooh-Bah


Reged: 01/30/06

Loc: Central Texas
Re: Weight of Loads On CGEM new [Re: nemo129]
      #3615129 - 02/09/10 04:06 PM

See this is where I get confused I was thinking about buying a CGEM and mounting my Meade 10 sct on it. After reading this post it seem the CGEM want carry my 10 sct plus guide scope and cameras. So if I want to defork my Meade 10sct and put it on a GEM mount for both visual and takening photo the CGEM will not do the job or handle the weight...right?. So the next GEM mount that might can handle that load jumps up in the prices range of around $4999.00 for a CGEpro or $7,295.00 for a losmandy hgm titan would these mounts work? I would hope so for that kind of money. At that price I can buy a whole new 12 SCT to 14 inch fork mounted goto with all the bells and whistles and have money left over. So I guess what I am asking, what doe's a working man have to spend to get a GEM mount that can hold a 10sct and be able to take photos with out braking the bank. Would it just be better to never defork the SCT and give up on using it for taken photos or use it as is on a Eq wedge. Or spend another $5000.00 to $8000.00 on a new mount just to be able to take some Deep sky photos. WOW is every one out there that are taking those great deep sky photos using these high end very costly GEM mounts? if not then what are they using because I would like to know so I don't have to spend $5000.00 just to take a photo of M42 or M13, I thank that my fork mounted SCT on a Eq wedge is looking better all the time...and I already have all of that.....

Edited by George Methvin (02/09/10 04:22 PM)


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DaemonGPF
Redonkulous
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Reged: 03/22/08

Loc: Aurora Colorado
Re: Weight of Loads On CGEM new [Re: George Methvin]
      #3615196 - 02/09/10 04:36 PM

George, I'm right there with you. Trying to figure out the best solution at this point for imaging within a certain budget. It seems so much cheaper to build up a dual fork SCT with a wedge to image, but I can't seem to find much info on Periodic Error in some of the typical fork systems from Meade or Celestron as example, nor what sort of capacity limitations those motors have when adding cameras, and guidescopes, etc. All of the GEMs I'm considering upgrading into start at the $5K mark and go up from there. Seems the only way to get a good blend of feature, capacity, and precision without compromising if you want to image on a GEM. $5K buys a nice fork mount SCT setup, with room to spare on accessories for sure. Decisions, decisions.

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Gargoyle
sage
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Reged: 03/13/08

Loc: Long Island, New York
Re: Weight of Loads On CGEM new [Re: DaemonGPF]
      #3615701 - 02/09/10 09:10 PM

Josh and George,

And I'm with both of you guys too... very well put George! I'm running a damaged Dec gear that Meade will not ship to me for replacement without sending my LX200R in for repair (which will incur a cost) which is just good money thrown away in my opinion. I've tried many times and they just flatly refuse to sell me the gear.

A GEM is really the only way to go for me. But as identified, the weight constraints push me to a CGE Pro, and that is a lot of money. So I'm saving a little here, a little there and hoping someday to buy a Pro mount, while nursing the LX200R mount.

Jerry


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nemo129
Post Laureate
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Reged: 01/03/10

Loc: WMass
Re: Weight of Loads On CGEM new [Re: Gargoyle]
      #3615745 - 02/09/10 09:36 PM

There might be the possibility of picking up a used CGE, but that still might not be enough mount for AP with the loads that George is talking about. I think the CGE is 65lbs load capacity, a bit more than the 40lbs the CGEM is rated for. There is the issue of support from C now that the mount is "retired". The other downside of the CGE Pro...aside from the price is it weighs a ton...well 75lbs for the mount anyway. I think the tripod and pier are a bit over 50lbs. Good if you have a permanent observatory or a scope buggy with a convienient storage location...not so good if you are trucking it outside from the house every good seeing night . The things we will do for the love of our hobby!

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galacticphoto
super member


Reged: 11/12/09

Loc: Huntsville, AL and Atlanta, Ga
Re: Weight of Loads On CGEM new [Re: George Methvin]
      #3616324 - 02/10/10 08:18 AM

Long exposure astrophotography can be expensive. A small market, low quantity production runs, and significant machining/touchtime conspire to keep the cost of mid to large mounts high. If you want a mount that carries a substantial weight (and reliably guides w/ low error) plan on paying for it.

You can have a lot of fun taking very nice photos with much smaller equipment, 3-4" refractors or 6-8" cats. These will allow much smaller (less costly) mounts to carry the equipment while achieveing good long exposure results.

You don't need to remortgage your house in order to buy unnecessary toys.

Robert


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George Methvin
Pooh-Bah


Reged: 01/30/06

Loc: Central Texas
Re: Weight of Loads On CGEM new [Re: galacticphoto]
      #3616407 - 02/10/10 09:13 AM

That's the way I will have to go is with my 120mm ed refractor on a CGEM mount for astro photos. I will be retireing in a few year and have a place out in the country. I plan on building a observatorie there to house my Meade 10 LX200 and my EON 120mm ed refractor they will both be put on permenent setup. I guess I will buy the CGEM for my 120mm and use it for photos, and hope the LX200 never brakes downs which there no rerason to think it will. Just don't think I want to invest $5000.00 to $8000.00 just to take photos. I hope the CGEM can handle the 120mm and a small guide scope plus camera.....LOL

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