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 >> Mounts

Pages: 1
jmasin
Carpal Tunnel


Reged: 12/22/08

Loc: Murphy, TX (DFW)
AP mount owners (or similar I suppose) new
      #4356019 - 02/01/11 04:00 PM

900's specifically... and yes I should have asked myself this question before buying, and yes I should ask AP... but darn it I'm gonna ask this group anyway!

I'm curious about capacity ratings.

My assumption would be the rule of thumb of 1/2*official rating needn't apply to the high-dollar handmade mounts?

True?

I'm contemplating budget for the next steps... and I figured I'd start with weight limits since that is an effectively hard-limit.

Thanks!


Post Extras: Print Post   Remind Me!   Notify Moderator  
LLEEGE
True Blue
*****

Reged: 03/03/05

Loc: Cloud-chester,NY
Re: AP mount owners (or similar I suppose) new [Re: jmasin]
      #4356031 - 02/01/11 04:04 PM

The 900 is rated for photographic loads. No need to derate it. I once asked Roland about mounting a 12", f16 classic cassigrain on mine which weighs about 100lbs +/-. He said it would be fine for visual use. It was.

Post Extras: Print Post   Remind Me!   Notify Moderator  
LLEEGE
True Blue
*****

Reged: 03/03/05

Loc: Cloud-chester,NY
Re: AP mount owners (or similar I suppose) new [Re: LLEEGE]
      #4356053 - 02/01/11 04:16 PM

There is close to 100 lbs of CW's on the shaft here:



Post Extras: Print Post   Remind Me!   Notify Moderator  
Paul G
Post Laureate
*****

Reged: 05/08/03

Loc: Freedonia
Re: AP mount owners (or similar I suppose) new [Re: LLEEGE]
      #4356277 - 02/01/11 05:45 PM

Quote:

There is close to 100 lbs of CW's on the shaft here:






Scope ID please?


Post Extras: Print Post   Remind Me!   Notify Moderator  
jmasin
Carpal Tunnel


Reged: 12/22/08

Loc: Murphy, TX (DFW)
Re: AP mount owners (or similar I suppose) new [Re: Paul G]
      #4356281 - 02/01/11 05:47 PM

[Mr. Burns from The Simpsons]

Exxxxxxcellllleeennnttt.

[/Mr. Burns from The Simpsons]


Thanks guys!!


Post Extras: Print Post   Remind Me!   Notify Moderator  
gillmj24
Post Laureate
*****

Reged: 12/06/05

Loc: PA
Re: AP mount owners (or similar I suppose) new [Re: jmasin]
      #4356357 - 02/01/11 06:16 PM

Heck with scope I'D, where'd ya get that huge CW?

Post Extras: Print Post   Remind Me!   Notify Moderator  
LLEEGE
True Blue
*****

Reged: 03/03/05

Loc: Cloud-chester,NY
Re: AP mount owners (or similar I suppose) new [Re: gillmj24]
      #4356473 - 02/01/11 07:04 PM

It's a Tinsley classical cassigrain from the early 60's. It was donated to our astronomy club by the University of Rochester when they decommissioned it. It was in very bad shape and was completely restored including mirror coatings. The CW came with the mount for the scope. The dome itself was donated along with the scope. Tinsley

Edited by LLEEGE (02/01/11 07:06 PM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Sharkman
super member


Reged: 08/12/06

Loc: Nelson, New Zealand
Re: AP mount owners (or similar I suppose) new [Re: LLEEGE]
      #4357208 - 02/02/11 12:55 AM

In addition to weight, another factor to consider with regard to capacity is the total lever arm. A longer lever requires more torque -- so the capacity should be higher for a cat/cas/mak/newt than a long refractor or a complex stacked setup.

Expected wind would also be worth factoring-in.


Post Extras: Print Post   Remind Me!   Notify Moderator  
jmasin
Carpal Tunnel


Reged: 12/22/08

Loc: Murphy, TX (DFW)
Re: AP mount owners (or similar I suppose) new [Re: Sharkman]
      #4357842 - 02/02/11 11:09 AM

Sharkman, thanks.

I'm leaning toward saving for something like a 12" truss RC. I'm a ways off from affording that, but something of that class. They are typically 40-50 lbs scope only, so gets me close to 65-70 when it's all said and done with guider, cam etc. I was trying to get a feel for that.

For that setup, the majority of weight would be around the primary mirror/body of the scope, so the DEC lever arm should be small. Not much I can do about the RA lever arm, except choose a small/lighter guide option. OAG may be best anyway.

Thanks for the inputs.

I should add there will be other, smaller, less expensive scopes in between now and something of that nature, so the AP900 was the right choice for me cost wise and timing, but I'm just curious how far it can go.



Edited by jmasin (02/02/11 11:33 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
Paul G
Post Laureate
*****

Reged: 05/08/03

Loc: Freedonia
Re: AP mount owners (or similar I suppose) [Re: LLEEGE]
      #4357912 - 02/02/11 11:45 AM

Quote:

It's a Tinsley classical cassigrain from the early 60's. It was donated to our astronomy club by the University of Rochester when they decommissioned it. It was in very bad shape and was completely restored including mirror coatings. The CW came with the mount for the scope. The dome itself was donated along with the scope. Tinsley




Sweet!


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


Extra information
25 registered and 45 anonymous users are browsing this forum.

Moderator:  Dave M, richard7, bilgebay, iceblaze 

Print Thread

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


Thread views: 899

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics