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Need replacement focus knobs for Vixen Porta Mount

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#1 Solar Ken

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Posted 02 May 2010 - 11:10 AM

I'd like to replace the focus knobs/shafts on my Vixen Porta Mount with a metal type with set screw, rather than the plastic slip on type that came with the mount.

Any suggestions where to find replacements?

Thanks, Ken

#2 Manny Myles

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Posted 02 May 2010 - 05:09 PM

Do you mean the slo mo cables as the Porta itself does not have focus knobs that I have ever seen ;-).
If you are looking for the slo mo cables, Astronomics has 'em.
m2

#3 thinger62

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Posted 02 May 2010 - 08:08 PM

I bought a pair of longer ones from the classifieds here. I think they're a pretty standard size, and I believe there are some for sale right now (or there were recently).

#4 Fred1

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Posted 02 May 2010 - 10:04 PM

Ken, are you looking for something like these?

http://scopestuff.net/ss_cstal.htm

#5 StargazerBill

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Posted 03 May 2010 - 10:08 AM

http://www.focusknobs.com/

#6 Solar Ken

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Posted 03 May 2010 - 03:21 PM

Oops, I didn't mean to say "focus" knobs. Yes I mean slo-mo knobs. I'm not interested in the flexible type so maybe the ones from focusknobs.com are the way to go. A little spendy though.

#7 skybsd

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Posted 03 May 2010 - 04:28 PM

Whew!

Glad you cleared that up. I was wondering if I had missed something completely fundamental in my understanding of how this mount work :)

Regards,

skybsd

#8 Jon Isaacs

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Posted 03 May 2010 - 06:58 PM

http://www.focusknobs.com/


Those look interesting... I don't recommend the flexible cable type slo mo controls, they can cause slow vibrations in the scope as the wobble.

Jon






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