Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
Get a Cloudy Nights T-Shirt Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu uh, User

Equipment Discussions >> Cats & Casses

Pages: 1
jrhargrove
newbie
*****

Reged: 02/28/13

Economical mount for SCT OTA
      #5755824 - 03/25/13 10:27 AM

Hello,

I am new to the forum but not to visual astronomy. After a long absence, I am thinking about buying a mid-aperture telescope; in the past, I have owned an 8" SCT, 4" refractor, a 15" dobsonian, and several small Newtonians. I am considering a dobsonian or perhaps SCT. Aperture, optical quality, and portability are most important to me; I have no need for go-to capability, and the purchase of a complete SCT with mount and electronics is more than I would like to spend.

My question concerns alternative mounting for a SCT. Can a 9.25, 10, or 11" SCT OTA be mounted on a simple alt/azimuth style mount? If so, would it be economical and advisable to do so? I would appreciate any and all opinions and guidance.

Thanks and best regards,

John Hargrove


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mark9473
Postmaster
*****

Reged: 07/21/05

Loc: 51N 4E
Re: Economical mount for SCT OTA new [Re: jrhargrove]
      #5755848 - 03/25/13 10:34 AM

See this recent thread: link.

Post Extras: Print Post   Remind Me!   Notify Moderator  
jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: Economical mount for SCT OTA new [Re: jrhargrove]
      #5755923 - 03/25/13 11:11 AM

"Can a 9.25, 10, or 11" SCT OTA be mounted on a simple alt/azimuth style mount?"

Well yeah, but a simple alt-az style mount capable of handling those OTAs is going to cost as much as a number of GOTO mounts that can also handle those OTAs, and the GOTO mount has the hugely important added bonus of tracking. The longer the focal length of the scope, the tinier the true field of view and the harder it is to put objects in that field of view and tor track them manually. If cost is what has you thinking manual alt-az, I'd say "think again" because cost won't be what differentiates the alt-az from the GOTO mounts capable of handling those OTAs.

Good luck!

- Jim


Post Extras: Print Post   Remind Me!   Notify Moderator  
hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: Economical mount for SCT OTA new [Re: jrbarnett]
      #5755942 - 03/25/13 11:21 AM

A 9.25 can be mounted on a GC5 (barely), the 10 and 11 you need at least a CGEM/Atlas type mount. A T-REX would also carry of the OTA's mentioned.

Post Extras: Print Post   Remind Me!   Notify Moderator  
jrhargrove
newbie
*****

Reged: 02/28/13

Re: Economical mount for SCT OTA new [Re: hfjacinto]
      #5756980 - 03/25/13 08:44 PM

Thanks to all of you for your responses.

John


Post Extras: Print Post   Remind Me!   Notify Moderator  
cavefrog
Carpal Tunnel
*****

Reged: 11/11/08

Loc: loozyanna
Re: Economical mount for SCT OTA new [Re: jrhargrove]
      #5757252 - 03/25/13 11:40 PM

I think one alt/az manual mount capable of handling a C-14
is a Stellarview M7. It runs around at $900 I think/

Theo


Post Extras: Print Post   Remind Me!   Notify Moderator  
cavefrog
Carpal Tunnel
*****

Reged: 11/11/08

Loc: loozyanna
Re: Economical mount for SCT OTA new [Re: jrhargrove]
      #5757257 - 03/25/13 11:43 PM

I think one alt/az manual mount capable of handling a C-14
is a Stellarview M7. It runs around at $900 I think.
But, as an alternative, one can build a 3" pipe mount with the same capability for under $100! granted, it wouldn't be as smooth as the M7, but it would be a lot less expensive.

Theo


Post Extras: Print Post   Remind Me!   Notify Moderator  
daniel_h
Carpal Tunnel
*****

Reged: 03/08/08

Loc: VIC, Australia
Re: Economical mount for SCT OTA new [Re: cavefrog]
      #5757343 - 03/26/13 01:10 AM

Unistar basic would d it with rings & a tripod, only 299 without guide handle, add 100 for the clamshell mounting

Post Extras: Print Post   Remind Me!   Notify Moderator  
rmollise
Postmaster
*****

Reged: 07/06/07

Re: Economical mount for SCT OTA new [Re: hfjacinto]
      #5757675 - 03/26/13 08:29 AM

Quote:

A 9.25 can be mounted on a GC5 (barely), the 10 and 11 you need at least a CGEM/Atlas type mount. A T-REX would also carry of the OTA's mentioned.




Sort of, maybe. The CG5 is (I assume that is what you mean) is perfectly adequate for the 9.25, and I've had a lot of fun with a C11 on one. Certainly the C8 is better on the mount for long exposure imaging.

As I have said before, there's nothing I like less than a long focal length scope on an undriven alt-az mount.


Post Extras: Print Post   Remind Me!   Notify Moderator  
hfjacinto
I think he's got it!
*****

Reged: 01/12/09

Loc: Land of clouds and LP
Re: Economical mount for SCT OTA new [Re: rmollise]
      #5758122 - 03/26/13 12:32 PM

Uncle Rod, I am a firm believer in the XW Budhha and his saying: "You can never overmount a telescope but you can sure undermount"

Personally I was never too happy with the CG5 and the 9.25 even with Anti Vibration pads, when I got the CGEM, I was much happier, but rock solid is a C8 on an Atlas/CGEM. I think a C11 really needs a CGEM as a start or preferrably a CGEM DX. I am thinking of a CGEM DX for my 9.25.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Geo.
Carpal Tunnel
*****

Reged: 10/01/08

Loc: Upstate NY
Re: Economical mount for SCT OTA new [Re: hfjacinto]
      #5767200 - 03/30/13 05:23 PM

The Giro III will handle a C11 with the Atlas/CGEM tripod and some counter weighting. Mine is German made, but I guess they are now Chinese, selling as the "ES Twilight GIRO-III/Azimuth double mount."

I see that Tech2000 has developed their own product to replace the Giro line now that ES owns it. Tech2000 "Giro Cube" Telescope Mounts see: http://www.tech2000astronomy.com/giro_G3_mounts/


Post Extras: Print Post   Remind Me!   Notify Moderator  
rmollise
Postmaster
*****

Reged: 07/06/07

Re: Economical mount for SCT OTA new [Re: hfjacinto]
      #5767215 - 03/30/13 05:30 PM

Quote:

Uncle Rod, I am a firm believer in the XW Budhha and his saying: "You can never overmount a telescope but you can sure undermount"

Personally I was never too happy with the CG5 and the 9.25 even with Anti Vibration pads, when I got the CGEM, I was much happier, but rock solid is a C8 on an Atlas/CGEM. I think a C11 really needs a CGEM as a start or preferrably a CGEM DX. I am thinking of a CGEM DX for my 9.25.




If you like the CGEM, that's fine. My CG5 does well enough that my Atlas stands in a corner, lonely and ignored. I'm lazy, you see.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Mark9473
Postmaster
*****

Reged: 07/21/05

Loc: 51N 4E
Re: Economical mount for SCT OTA new [Re: Geo.]
      #5767387 - 03/30/13 06:54 PM

Quote:

The Giro III will handle a C11 with the Atlas/CGEM tripod and some counter weighting. Mine is German made, but I guess they are now Chinese, selling as the "ES Twilight GIRO-III/Azimuth double mount."



Tele-Optic in Germany still sells the real deal.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
14 registered and 16 anonymous users are browsing this forum.

Moderator:  Cotts, Starman27, kkokkolis 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 773

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics