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Equipment Discussions >> Mounts

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JonNPR
sage
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Reged: 03/04/13

Loc: Oregon
Re: Twilight I Or Vixen Porta II? new [Re: JMZM]
      #6157497 - 10/25/13 01:37 PM

Ok, just about ready to order, mount is due here on Monday - so last question: is about weight and length. Obviously, this is my first encounter with these options, and I appreciate very much for your help, guys!

For an f10 C102GT long tube, on the Twilight I mount, should I be concerned about the weight of the plate and does its length make a difference in stability/shakes?

I saw a universal 7" that is 10 oz, but pricey with shipping. The Orion universal 13" - twice as heavy? Didn't see the weight on their page.

Advantages to longer or shorter plate?

Thanks!

Jon

Edited by JonNPR (10/25/13 02:27 PM)


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DavidNealMinnick
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Reged: 03/06/06

Re: Twilight I Or Vixen Porta II? new [Re: JonNPR]
      #6159153 - 10/26/13 01:02 PM

Quote:

Ok, just about ready to order, mount is due here on Monday - so last question: is about weight and length. Obviously, this is my first encounter with these options, and I appreciate very much for your help, guys!

For an f10 C102GT long tube, on the Twilight I mount, should I be concerned about the weight of the plate and does its length make a difference in stability/shakes?

I saw a universal 7" that is 10 oz, but pricey with shipping. The Orion universal 13" - twice as heavy? Didn't see the weight on their page.

Advantages to longer or shorter plate?

Thanks!

Jon




Jon, I don't see an advantage to the longer one as it has more weight for the mount to bear. You'll need to slide the OTA forward or back in the rings to achieve proper balance in either case.

The angular Vixen plate is quite limited as far as sliding it for-aft on the mount. And pay attention how your rings bolt up to the plate. If the ring's boltholes are on center, the plate sold by Orion will not accommodate them as the plate's center bar is flush with the mount's saddle plate.


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JonNPR
sage
*****

Reged: 03/04/13

Loc: Oregon
Re: Twilight I Or Vixen Porta II? new [Re: DavidNealMinnick]
      #6159207 - 10/26/13 01:38 PM

Thanks David. I will find out next Saturday, when that Orion plate is due. Saw that I had enough points on Amazon for the Universal version yesterday, before reading your post.

Jon


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JonNPR
sage
*****

Reged: 03/04/13

Loc: Oregon
Re: Twilight I Or Vixen Porta II? new [Re: JonNPR]
      #6160784 - 10/27/13 01:56 PM

David, in case the plate I ordered doesn't fit, as you described, what model do you suggest that will ?

Thanks -

Jon


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DavidNealMinnick
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Reged: 03/06/06

Re: Twilight I Or Vixen Porta II? new [Re: JonNPR]
      #6160841 - 10/27/13 02:18 PM

Jon, if you're getting a Vixen/Celestron-style plate it will fit the mount. My concern was regarding ring bolt pattern/dovetail plate hole pattern compatiblility, and how it will effect the plate's ability to slide fore-aft on the mount. You'll see what I mean when it arrives, and if unworkable ADM has one that will.

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JonNPR
sage
*****

Reged: 03/04/13

Loc: Oregon
Re: Twilight I Or Vixen Porta II? new [Re: DavidNealMinnick]
      #6161113 - 10/27/13 05:19 PM

Yes, the ring bolt fit mention is what got me concerned reading your note. Not to mention the length. I had been thinking about adjustability for balance, given my 2"" diagonal, low power weighty EPs, and an 8x50 finder and rings.

Will find out late this week and go from there. Thanks again for your informative replies.

Jon


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