Telescope Reviews: Which mount for a 150mmf/8 refractor

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Equipment Discussions >> Mounts

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Jeff B
Carpal Tunnel

Reged: 12/30/06

Re: Which mount for a 150mmf/8 refractor new

[Re: TomN]
#3154896 - 06/09/09 10:00 PM Attachment (67 downloads)

My good old CR6 was an easy load for the GM8 with damping times from a finger tap of less than a second. Focusing at high power was easy even with the stock focuser.

Jeff

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ibase
Vendor Affilliate

Reged: 03/20/08

Loc: Manila, Philippines 121*E 14*N

Re: Which mount for a 150mmf/8 refractor new

[Re: TomN]
#3155195 - 06/10/09 01:24 AM

Thanks guys.

Eddgie, I guess I can live with some wiggles. The reason I asked is that I already have a CG-5 GT and want to utilize it fully with a C8, a 102ED and a 6" short refractor. I better start saving up for the 6.

Don, great setup you have there, nice touch on the extension tube (so I don't have to sit on the ground as Eddgie says), will follow that lead, maybe have a heavy one fabricated to help dampen the shakes. 3 seconds at 200x is very acceptable I think.

Tom, no doubts about the G-11, thanks all.

Best,

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ibase
Vendor Affilliate

Reged: 03/20/08

Loc: Manila, Philippines 121*E 14*N

Re: Which mount for a 150mmf/8 refractor new

[Re: Jeff B]
#3155199 - 06/10/09 01:28 AM

Jeff, great setup! Goes to show how stable the GM8 is with the 6.

Best,

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RAKing
Postmaster

Reged: 12/28/07

Loc: West of the D.C. Nebula

Re: Which mount for a 150mmf/8 refractor new

[Re: Jeff B]
#3155368 - 06/10/09 07:52 AM

Nice rig, Jeff.

I have always been pleasantly surprised at how well the channel tripod works on my GM-8. It's much more stable than I thought it would be and carried my TMB130 with similar results.

Ron

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Jeff B
Carpal Tunnel

Reged: 12/30/06

Re: Which mount for a 150mmf/8 refractor new

[Re: RAKing]
#3155831 - 06/10/09 01:51 PM

Thanks Herando & Ron.

I found that a simple weight counterpoise to the finder balanced the OTA wonderfully in all DEC orientations, which helps reduce vibration. The weight also biased the OTA forward a bit, making meridian viewing much more comfortable. Adding the "pizza pie plate" accessory holder stiffened the tripod up further. Using vibration pads on hard surfaces was icing on the vibration cake.

This combo was very satisfying to use visually and I miss it.

Jeff

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Jeroen
member

Reged: 08/20/06

Loc: Belgium

Re: Which mount for a 150mmf/8 refractor new

[Re: Tamiji Homma]
#3157551 - 06/11/09 02:18 PM

Hi Everyone (Tammy, Gshaffer,...),

Thanks for your response.

I've upgraded my saddle plate with a dual ADM saddle (accepts Vixen and Losmandy style) and will have a try with a losmandy style plate and see what happens.
I must say that buying a new mount is very tempting; but a decent mount one 'step' higher with GOTO capabilities costs at least double the price of a EQ6 Pro.
Tammy, I've seen a 10 micron mount at ATT (Essen, Germany) among other beautifull mounts. It is a magnificent and impressive mount, but would not like to carry it around. Just my humble opinion.

Jeroen

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boydd
sage

Reged: 12/07/07

Re: Which mount for a 150mmf/8 refractor new

[Re: Jeroen]
#3158147 - 06/11/09 08:52 PM Attachment (51 downloads)

Quote:

Hi everyone,

At this moment I am using a EQ6 Pro (pier mounted) as a mount for my telescopes. For small telescopes this mount is rock steady.
But a 150mm f/8 refractor (12kg without acc.) is a different story. The EQ6 is not 'overloaded' but at its maximum due too the long tube.
Which mount (reasonably priced) would be needed to make this big refractor also rock steady ? Would a G11 be enough ?

Thanks for your advice.

Jeroen

The B52 Stratofortress

Twin Mount Astrozap 152 mm/F5 Petzval/Feathertouch focusers/motor drives
Mounted on a Giro 2 with needle bearings, Tech2000 Dob Driver , and G-11 HD tripod
Manual pendant or computer driven all on a Radio Flyer Scopebuggy
Sometimes ICSM’s or ICBM’s on the sides

"Because it Works"
Dave Boyd

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