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10" Newt on a Giro 3?

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#1 Teal'c

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Posted 09 February 2009 - 09:56 PM

With the counter weight in place, I wonder if the Giro 3 can handle this OTA? I do know that the "specified" weight limit is somewhat conservative, but I might be pushing it with this scope.

http://www.telescope...roduct_id=09959

#2 Erik D

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Posted 09 February 2009 - 10:49 PM

Orion OTA is 27.5 lbs. What's the expected assembled wt with Rings, dovetail plate, finder and other accessory onboard?

My Giro 2 DX can handle 30 lbs on EACH side easily. I am using Losmandy G11 saddle and 13.5 inch dovetail plate. I believe the Giro 3 is rated for more. Correct?

ERik D

#3 Teal'c

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Posted 10 February 2009 - 05:41 AM

Thanks Erik,

I'm not absolutely sure that the G3 has a higher weight capacity than the G2? If your getting the results that you state, then it might be worth a try.

#4 Jim7728

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Posted 10 February 2009 - 07:12 AM

My 7" Meade mak plus accessories is about 28lbs plus which is equivalent to Tele-Optic stated carrying capacity for my GR3-TV model,though imo it can take a heavier load as long as it's balanced proberly.

http://www.tele-opti...ID_5186398.html

The GR-3 TV handles my 7" mak well. Vibrations are present at high power, but not bothersome. The duelspeed moonlite focuser helps.

I think the longer 10" reflector ota may be more susceptible to vibrations, but should function as long as it's properly balanced. I'd go with a heavier losmandy type saddle and dovetail bar for more stability, but personally would rather have the reflector on a dob mount which, imo, would be more stable, lower to the ground and easier to setup.

Good luck with putting it on a Giro, if you go that way. It would be interesting to see how it works out for you. ;)

#5 Erik D

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Posted 10 February 2009 - 07:21 AM

Kurt,

There are several CN reviews of the Giro 2 DX. This is the one that convinced me the Giro 2 can handle my 6 inch F8 AP refractor. ( OTA is ~5 ft long with dew shield and diagonal attached)

http://www.cloudynig...php?item_id=657

I seem to remember posting my Markus Ludes stating the Giro 3 DX is smoother and can handle more load the the Giro 2 DX. You could email him to verify that.

One thing I did was to invest extra for the Losmandy G 11 Saddle instead of the smaller saddle I have seen with many Giros. I can use a standard Losmandy plates and slide the long DUP back and forth to achieve perfect balance. I am using 7 inch Parallax Rings. The pair of Rings alone are quite hefty. I would not use a small saddle of flimsy mounting plates.

My OTA wt is ~30 lbs on one side. I ordered 2X 11.5 lb counter wts but found one counter wt is sufficient for smooth panning.

The old Giro XXL can hold an extremely heavy load( I think 203mm/F9 APO was mentioned) but cost was nearly $1K.

http://cloudynights....php?item_id=459

UA has a new Double Star mount. 40 lb on one side the 30 lb on the other. $599

http://universalastronomics.com/

ERik D

#6 kolsen

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Posted 10 February 2009 - 12:02 PM

Sorry to change the subject, but where is a good place to buy a Giro 3?

#7 Erik D

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Posted 10 February 2009 - 12:22 PM

Hands On Optics is one dealer:

http://www.handsonop...m/mts_giro.html

Teton Telescope is another:

http://www.tetontele...?cPath=25_36_70

I am not sure I like the bright metallic red color on the Giro 3 for my scopes. A red knob on the saddle is OK but I don't have red OTA or Rings to match.....

ERik D

#8 kolsen

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Posted 10 February 2009 - 01:28 PM

Thanks Erik. I agree about the red color. If you look on the teton web site one of the giro's is silver and it appears to be a giro 3...

#9 Alterf

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Posted 11 February 2009 - 01:09 AM

I own a Giro III from Teton Telescope. They come in black and silver, too (my bride told me unequivocally that red would not fit in the living room). Well, I put a Meade AR-6 on one side and weights on the other. The scope comes in at around 23 lbs. with eyepieces, and the Giro is fine with that. It is also fine with the C8 Ultima tube, which is also about that heavy. It's really a slick mount, like a dob mount for refractors and cats.

#10 Luis.E

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Posted 11 February 2009 - 03:11 AM

I have a giro 2, had monted several telescopes, including a ED80, A skywatcher 6" f5, TMB 105 f6.2.
The giro II is monted in a manfrotto 028 and is very stable, i put dsc in it ans is heaven.
At higher mag there is some vibration but nothing that bother me.
I think you will be satisfy with the giro 3, you have to put it on a good tripod like the Berlebach.

Regards.

#11 Erik D

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Posted 11 February 2009 - 12:24 PM

I own a Giro III from Teton Telescope. They come in black and silver, too (my bride told me unequivocally that red would not fit in the living room).


Seems there are conflicting info about the color(s) available. This is what I saw in the Tenton scope Giro page, para 4:
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GR mount arms come with 2 M6 screws spaced 1 3/8"(about 35-36mm) on center, which is an industry standard and fits Takahashi, Borg, Intes, and other tube rings. The saddle plate of your choice can easily be adapted for use if hole spacing of this spec does not already exist on your saddle plate. The finish is all brushed or anodized alum in silver, black, red, and blue.

Currently all new GR3's are available in red only.

--------------------------------------

Perhaps a phone call is advisable if you are looking for something other than RED.

ERik D

#12 buckeye_hunter

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Posted 11 March 2009 - 11:16 PM

Hi,

I just picked up a Giro II Deluxe on the other forum. I wanted to see how it compares with a Stellarvue M6.

Luis, where did you find the DSC for your mount?

Clear Skies!

Bob Hart

#13 NHRob

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Posted 14 March 2009 - 07:42 AM

Is there any difference between the Giro II Deluxe and the Giro III?

Rob

#14 Jim7728

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Posted 14 March 2009 - 10:14 AM

Is there any difference between the Giro II Deluxe and the Giro III?

Rob


Giro III has a bit more load capacity over the II according to the manufacturer.

http://www.tele-opti...ID_5186398.html

Same on the outside, different guts. ;)

#15 Darenwh

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Posted 14 March 2009 - 02:35 PM

Though I think it would, my question would be, why? If you want a newt on an alt az mount why not just use a dob mount? A well designed dob mount is just about the simplest style mount you can get. It also is very stable and can be compact. So, why mount the scope on an alt az mount that is on a tripod adding lots of locations that could be the source of slop that could cause the alt az mount to not perform well with the scope?






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