Last updated: 10 May 2005

ETX low cost selfmade flexible focuser tip

Subject:	ETX 90 Focus Cable
Sent:	Monday, May 9, 2005 11:09:11
From:	Tom Mordasky (
This has been discussed quite a bit on your site. I have owned my ETX-90
for about 5 years now. The only thing I found to be consistently
disappointing was the focus knob. Every time you touch it the scope
vibrates so much that you have to wait for the motion to stop before you
can even see the results of your adjustment. For about $5 US I built the
flexible focus cable described on you site, since the parts all came in
packages of 2 I was able to construct a second one that I will pass
along to a friend with the same scope. Thanks for a great site!

Parts: I could only find plastic spacers, aluminum would have been better.


Assembled knob


Works Great!


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