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Kfrank
sage
Reged: 12/20/08
Posts: 221
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I have removed my ETX90 ota from the fork mount and plan to use it on a UA McroStar. The mount handles the scope very well but mounting it with the 1/4 - 20 holes in the base of the ota, puts the eyepiece at the side of the scope. I'd like to use rings to mount the scope so as to get the eyepiece back to its normal orientation but can't find any rings that the vendors think will fit.
I priced a set from a site where the owner will custom make the rings but frankly, I don't want to pay his prices.
Does anyone know a source (or do you have a clever DIY approach) of rings to mount the tube??
Please don't suggest using a visual back. I've considered, and rejected, that option.
-------------------- Ken
ST80
SV80ED
ETX90 (Deforked)
Orion XT8
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Arthur Dent
Galactic Hitch-Hiker
   
Reged: 10/23/08
Posts: 1475
Loc: A damp South Yorkshire, UK
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Hi guys,
Similar query to Ken's above although I have an ETX-105 that has had RA drive problems from day 1 (it was a s/hand scope).
Planning to mount it on a NexStar SE mount to start with, then aiming for a GEM later on.
As Ken said, the mounting holes on the ETX are underneath which would mean that to EP/diagonal is at the 3pm position.
Apart from having a custom 'L' bracket made from a block of solid aluminium, are there any other ways of mounting it on my NexStar SE mount as the purchase of a GEM is some way off yet.
Cheers in advance,
Art
-------------------- If I like it, the wife says that we can't afford it!
=======================================================
Meade ETX105 & Celestron NexStar 6SE with Bob's Knobs
6-26mm EPs + Hyperion 8-24mm
MRF and Antares 8x50 RACI finder scope
Canon EOS 400D DSLR (un-modded) and SPC900 webcam. Finally climbing the AP Learning Curve!
<img width="600" height="300" src="http://7timer.y234.cn/exe/apanel.php?country=UK&adm=UKL9&site=0&en">
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BillBrowning
Vendor - Astrosightsaver
   
Reged: 05/03/05
Posts: 177
Loc: New York NY
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http://www.admaccessories.com/ has rings for just about anything you need. Not sure of the prices but you wont be dissapointed with his products.
-------------------- C8 deluxe
4.5 newt
Orion ST 90
ETX 90 mak
10x50 Minolta binos
15x70 binos
PST
Canon 300d unmodded
SightSaver red screen shield
www.astrosightsaver.com
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nighty
sage
   
Reged: 12/31/06
Posts: 353
Loc: 75w39n
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Less expensive but serviceable rings can be found at www.scopestuff.com and www.telescope.com
You may also need a dove tail bar for the Microstar. I have several sets of each brand's rings. CS Terry
-------------------- Stuff to look at stars and things
Scopes For Kids Project
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Kfrank
sage
Reged: 12/20/08
Posts: 221
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Thanks folks.
The problem is solved!!
I looked at a variety of places for scope rings. The ETX90 ota has a diameter of just over 4". Talking with Manish at Agena (who tried some rings out on his ETX90) I discovered that 4" rings won't work (too small) and the 4.2" rings readily available are just to big to give a secure fit, even with additional felt. This leaves custom rings and I didn't want to pay the freight for this option.
Today I talked with Larry at Universal Astronomics. Looks like one of his binocular mounting brackets will do the job. The bracket is designed to work with the MicroStar basic mount that I have. For a very reasonable charge, Larry agreed to remove the captive 14x20 screw for mounting the binoculars and mill a slot in the bracket to accommodate the mounting holes in the bottom of the ota. Problem solved and for a lot less than a pair of custom rings.
Thanks Larry and thanks to all for the suggestions.
-------------------- Ken
ST80
SV80ED
ETX90 (Deforked)
Orion XT8
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Bob Myler
sage
   
Reged: 05/18/06
Posts: 300
Loc: St Louis, MO
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Mind telling us how much they cost?
Edited by Bob Myler (07/07/09 11:27 PM)
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