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Canon Pete
member


Reged: 03/26/09
Posts: 45
Loc: Scotland
Load capacity
      #3176363 - 06/22/09 01:36 PM

Hi

Wondering if anyone has knowledge of working load of CG5 , mostly for imaging. Reason I ask is that I have a SW 200 f5 Newt. Beast of a scope and requires additional CW on shaft. Also I have a C80 , would like to use it side by side but unsure if its actually possible with out stressing the mount.

Seems to be a bit of conflicting advice re weight limit around the net , hence asking here if any one has personal experience.

--------------------
C80 GT Apo / CG5 Mount
SW 200mm f5 Newt'
Bresser 10x50 Bino's
Hyperion Clickstop 8mm - 24mm Zoom
25mm WA LER,20mmPl,10mm EP's
2 x2 Barlows , Star Diagonal.
Canon 450D (unmodded)
Various other bits n bobs !
And a whole heap of Passion for AP !!!


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LLEEGE
True Blue


Reged: 03/03/05
Posts: 12767
Loc: Cloud-chester,NY
Re: Load capacity new [Re: Canon Pete]
      #3176366 - 06/22/09 01:37 PM

I wouldn't push a CG5 much past 15~18 lbs for AP. You could go higher but you will be limited to ~60sec exposures.

--------------------
A wise man once said........nothing.

A good mount
A few good OTA's
A few good EP's
A decent camera
Crappy skies


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averen
Vendor Main Sequence Software


Reged: 01/20/09
Posts: 393
Loc: Austin TX
Re: Load capacity new [Re: LLEEGE]
      #3176395 - 06/22/09 01:55 PM

I use my CG-5 (ASGT...whatever you want to call it!) with a C8 and an Onyx 80EDF. It's at the top of the load no doubt about it...however it's usable for photography as long as there is little to no wind. I wouldn't recommend loading it down that much though. I probably have close to 26lbs on the mount which requires both counterweights to be clear at the bottom of the shaft.

http://www.flickr.com/photos/averen1/3531221114/in/set-72157618142057532/

I have a side by side plate coming which should keep things a little closer to center and should allow me to raise up the counterweights a little bit.

I think that if you can stay under or around 15lbs then that's probably best with this mount for AP. More weight is possible but if you want to avoid some headache keep it lighter! I believe the mount is rated at 28lbs. General rule is to half that for AP.

Jared

--------------------
Try Sequence Generator Pro! Image capture software for CCDs and DLSRs with Plate Solving and Auto Focus support.

Astro Photos on Flickr

PHD Guiding Contributer


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Canon Pete
member


Reged: 03/26/09
Posts: 45
Loc: Scotland
Re: Load capacity new [Re: averen]
      #3176461 - 06/22/09 02:38 PM

Thnx Lleege and Jared

Jared , can I ask what length of exposure you're getting , maximum without bloating/trailing with that set up ?

One of the problems ( IMHO ) is the sheer length of the 200mm Newt OTA I have. Quivers at the slightest touch , tho' using a lappy to view / image away from mount does help.

--------------------
C80 GT Apo / CG5 Mount
SW 200mm f5 Newt'
Bresser 10x50 Bino's
Hyperion Clickstop 8mm - 24mm Zoom
25mm WA LER,20mmPl,10mm EP's
2 x2 Barlows , Star Diagonal.
Canon 450D (unmodded)
Various other bits n bobs !
And a whole heap of Passion for AP !!!


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averen
Vendor Main Sequence Software


Reged: 01/20/09
Posts: 393
Loc: Austin TX
Re: Load capacity new [Re: Canon Pete]
      #3176674 - 06/22/09 04:10 PM

I'm imaging with a DSLR so I don't tend to go beyond 10 minutes. I've had good results up to 10 minutes and I can go unguided with the mount for up to 3 minutes with only the refractor on the mount. I've never tried any unguided exposures with the full setup.

If you already have the CG-5 you might as well give it a shot. You might want to make a cheapo guidescope out of a 9x50 finder though...that would weigh a lot less than a C80.

When fully loaded my setup is pretty shakey, which is why I can only image when it's calm.

Jared

--------------------
Try Sequence Generator Pro! Image capture software for CCDs and DLSRs with Plate Solving and Auto Focus support.

Astro Photos on Flickr

PHD Guiding Contributer


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Canon Pete
member


Reged: 03/26/09
Posts: 45
Loc: Scotland
Re: Load capacity new [Re: averen]
      #3176856 - 06/22/09 06:18 PM

Cheers Bud , I had thought of using the Finder from the the SW, its slightly better than the C80's one. Just need to get myself a film canister to mount the webcam to to FS

--------------------
C80 GT Apo / CG5 Mount
SW 200mm f5 Newt'
Bresser 10x50 Bino's
Hyperion Clickstop 8mm - 24mm Zoom
25mm WA LER,20mmPl,10mm EP's
2 x2 Barlows , Star Diagonal.
Canon 450D (unmodded)
Various other bits n bobs !
And a whole heap of Passion for AP !!!


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HaleBopper
professor emeritus


Reged: 01/14/08
Posts: 728
Loc: Land of Ice and Snow
Re: Load capacity new [Re: Canon Pete]
      #3177724 - 06/23/09 06:47 AM

I have a C8, Orion ST 80mm guidescope, guide rings etc, my factory finderscope, DSLR plus focal reducer, and T -adapter etc mounted on the CG5. So far I have been able to get 5 min subs with very good results, and could probably go higher. In total my weight is just over 20 pounds. A bit much, and the lighter you can go the better, however, it is doable IMO.

--------------------
Celestron Edge HD 11, 190 mm Orion Mak-Newt, Astro-Tech AT90EDT
Losmandy G11, NEQ6 PRO
Canon 450D XSi
5, 8, 13, 17, 24mm Orion Stratus
Hyperion 31 mm Aspheric
Axiom 23 mm
Pentax 10 mm XW


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Canon Pete
member


Reged: 03/26/09
Posts: 45
Loc: Scotland
Re: Load capacity new [Re: HaleBopper]
      #3178166 - 06/23/09 12:56 PM

Thnx HB , beginning to think a SCT would have been a better choice for the mount in tandem with the C80.

--------------------
C80 GT Apo / CG5 Mount
SW 200mm f5 Newt'
Bresser 10x50 Bino's
Hyperion Clickstop 8mm - 24mm Zoom
25mm WA LER,20mmPl,10mm EP's
2 x2 Barlows , Star Diagonal.
Canon 450D (unmodded)
Various other bits n bobs !
And a whole heap of Passion for AP !!!


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