#1  
Old 24-01-2020, 07:12 PM
davesokolich (Dave)
Registered User

davesokolich is offline
 
Join Date: May 2019
Location: NORTH LAKES
Posts: 5
Keeping weight down on large SCT

I currently have a standard celestron SCT 1100,and needed to mount a dual-use auto-guider / finder on the OTA and also reduce weight.
I am reluctant to move from CGEM as I intend using Hyperstar ASAP.
The problem is the scope is already heavy, so adding something like a Farpoint C11 mounting plate at over 1KG. I feel I would get more value for money using Hyperstar than going to CGX which is twice the price of HS.
Auto-Guider Mount Weight Reduction
My solution was to use the Baader Standard Clamp to fit on the OTA and using the original bolts on the scope.
This is the only non-mounting plate solution which had the width for the screws and is extremely stable.
Counter-Weights
The second way to reduce weight is to reduce the counterweights from 7.5KG to 5KG where possible, even is only one of these is reduced.
The result is a reduction of at least 3.5KG on the mount.
Am I being paranoid is this the norm for us Astro-geeks?
Reply With Quote
  #2  
Old 25-01-2020, 01:53 PM
Camelopardalis's Avatar
Camelopardalis (Dunk)
Drifting from the pole

Camelopardalis is offline
 
Join Date: Feb 2013
Location: Brisbane
Posts: 4,694
Quote:
Originally Posted by davesokolich View Post
Am I being paranoid is this the norm for us Astro-geeks?
Yeah probably

So long as you're not over the maximum payload for the mount, you should be OK. Take time to get your balance right.

Also, don't lose sight of the focal length difference you'll get with the Hyperstar...it'll be roughly a fifth of the native, and exposure times will be MUCH shorter. Consequently, anything affecting your tracking will be much less visible with Hyperstar.
Reply With Quote
  #3  
Old 25-01-2020, 03:17 PM
Merlin66's Avatar
Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
 
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 7,222
Dave,
The counterweight don't "count" towards the loading on the mount.

I use my C11 with 60mm eFinder, flip mirror and camera, spectrograph with "on-axis" guiding (using a reflective slit plate), Lodestar and ATiK 314 imaging camera. I think just over 17 Kg...
All this, with five x 5 Kg counterweights on a NEQ6 pro.

Works for me.
Attached Thumbnails
Click for full-size image (Mainsail Obs 001s.jpg)
64.7 KB26 views
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 10:47 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Star Adventurer
Advertisement
Testar
Advertisement
EQ8-R
Advertisement
Celestron RASA
Advertisement
Lunatico Astronomical
Advertisement
Astromechanics
Advertisement
Astronomy and Electronics Centre
Advertisement