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
m00nless
sage


Reged: 08/06/08

UniStar questions new
      #5381083 - 08/22/12 01:23 PM

Does the UniStar have sufficient tension to secure a long optical tube pointing to a high altitude and at the same time allow for smooth movement of the optical tube without having to adjust tension again? Is it necessary to adjust tension or re-balance an optical tube when switching between eyepieces of different weight?

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


Reged: 12/20/08

Loc: Northern Colorado
Re: UniStar questions new [Re: m00nless]
      #5381140 - 08/22/12 01:59 PM

With all the UA mounts, scope balance is a critical parameter. If the tube is not properly balanced, the tension on the alt axis may need to be set higher which may affect smoothness of operation.

I found that having the balance set slightly nose heavy worked best - however, adding a barlow or changing EPs can (and will) change the balance point.

Once I switched to a mount with slo-mo controls, I was much happier.


Post Extras: Print Post   Remind Me!   Notify Moderator  
m00nless
sage


Reged: 08/06/08

Re: UniStar questions new [Re: Kfrank]
      #5381244 - 08/22/12 03:00 PM

Quote:

Once I switched to a mount with slo-mo controls, I was much happier.




Which mount with slow motion controls did you switch to?


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


Reged: 12/20/08

Loc: Northern Colorado
Re: UniStar questions new [Re: m00nless]
      #5382605 - 08/23/12 11:32 AM

Quote:

Quote:

Once I switched to a mount with slo-mo controls, I was much happier.




Which mount with slow motion controls did you switch to?




Stellarvue MG2.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Rich V.
Post Laureate
*****

Reged: 01/02/05

Loc: Lake Tahoe area, Nevada, USA
Re: UniStar questions [Re: Kfrank]
      #5383506 - 08/23/12 08:43 PM

I agree with Ken; balance is critical because it's important to keep the tension low for the smoothest motions.

For me, with a 130mm f7 refractor, I've found it best to use roughly similar sized eyepieces. I can switch from Pentax to Ethos without re-balancing but going from a N3-6 zoom to a 21 Ethos is too extreme and a re-balance is necessary.

I like the simplicity of the Unistar; it doesn't require an extension and there's no clearance problems between scope and tripod. As long as I have a D style dovetail bar that's long enough to provide at least 3" of fore/aft movement I'm OK. It only takes about 5 seconds to slip the dovetail bar one way or the other in the clamping jaws so IMO, it's no big deal. I can track just fine at the scope's limit of ~300x so the added complexity of slo-mo isn't a feature I feel I need.

Rich


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


Extra information
18 registered and 46 anonymous users are browsing this forum.

Moderator:  Dave M, richard7, bilgebay 

Print Thread

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


Thread views: 388

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics