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ben2112
scholastic sledgehammer


Reged: 07/12/12

Loc: North Charleston SC
Re: 8SE OTA conversion to Equatorial? new [Re: Midnight Dan]
      #5979596 - 07/19/13 10:52 AM

Yep.. She is a keeper.. 15 years and counting..

I would love to go to a 9.25 but I would have to get a CGEM mount and then I have to deal with weight. I have to keep things kind of light due to my back. I do like the idea of a nice refractor. Got any suggestions?


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Midnight Dan
Postmaster
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Reged: 01/23/08

Loc: Hilton, NY, Yellow Zone (Bortl...
Re: 8SE OTA conversion to Equatorial? new [Re: ben2112]
      #5981371 - 07/20/13 12:29 PM

Hi Ben:

One thing to point out - if you want to use the refractor on the SE mount, it will have to be pretty small. Generally, a short 80mm is about the limit or it will hit the base when pointing to zenith. Here's a few possibilities:

Astro-Tech 72mm ED ($379):
https://www.astronomics.com/astro-tech-at72ed-72mm-refractor-telescope-black_...

Explore Scientific 80mm ED ($799):
http://www.optcorp.com/es-ted0806-00-80mm-f-6-ed-apo-refractor-telescope-with...

Stellarvue 110mm ED ($1295):
http://www.optcorp.com/stellarvue-sv110ed-refractor-telescope-sv-sv110-25sv.html

-Dan


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RTLR 12
Post Laureate
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Reged: 12/04/08

Loc: The Great Pacific NorthWest
Re: 8SE OTA conversion to Equatorial? new [Re: Midnight Dan]
      #5981572 - 07/20/13 03:00 PM

Dan,

Do you actually put your SV110 on your SE mount? I would never consider putting my SV115 on mine. Much too long and heavy for me. I do use my R130sf Vixen on the SE mount though.

Stan


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ben2112
scholastic sledgehammer


Reged: 07/12/12

Loc: North Charleston SC
Re: 8SE OTA conversion to Equatorial? new [Re: RTLR 12]
      #5981695 - 07/20/13 04:42 PM

Dan - That Astro-Tech is the one I was considering. It would fit within my budget.

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Midnight Dan
Postmaster
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Reged: 01/23/08

Loc: Hilton, NY, Yellow Zone (Bortl...
Re: 8SE OTA conversion to Equatorial? new [Re: ben2112]
      #5981850 - 07/20/13 07:09 PM

Hi Stan:

No, definitely not. The SV110 is way too big. The only scopes I've really used on the 8SE mount are the Shortube 80, and the EON 72 (same scope as the AstroTech 72mm).

I was just recommending a larger scope like the SV110 as a good astrophoto alternative to the C8 on the GEM mount.

-Dan


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rockstarbill
super member


Reged: 07/16/13

Loc: Snohomish, WA
Re: 8SE OTA conversion to Equatorial? new [Re: Midnight Dan]
      #5981936 - 07/20/13 08:13 PM

Just finished my conversion from the stock SE mount to the AVX. I bought an extra counterweight, and I installed it while setting up the mount, but I suspect that with just the 8" OTA and the stock finder, that 22lbs of counterweight is overkill. Should I remove one?

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RTLR 12
Post Laureate
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Reged: 12/04/08

Loc: The Great Pacific NorthWest
Re: 8SE OTA conversion to Equatorial? new [Re: Midnight Dan]
      #5981943 - 07/20/13 08:16 PM

Quote:

Dan,

Do you actually put your SV110 on your SE mount? I would never consider putting my SV115 on mine. Much too long and heavy for me. I do use my R130sf Vixen on the SE mount though.

Stan



Quote:

No, definitely not. The SV110 is way too big. The only scopes I've really used on the 8SE mount are the Shortube 80, and the EON 72 (same scope as the AstroTech 72mm).




Well that's a relief! I just couldn't see that long refractor on the SE. My Onyx 80 and SV 70 are just perfect for it. Good size, length and weight for the SE 6/8. I use that set up at public outreach a lot. It's a popular combination with the kids. Sometimes I use it as a table top set up.

Stan

Edited by RTLR 12 (07/20/13 08:26 PM)


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RTLR 12
Post Laureate
*****

Reged: 12/04/08

Loc: The Great Pacific NorthWest
Re: 8SE OTA conversion to Equatorial? new [Re: rockstarbill]
      #5981955 - 07/20/13 08:22 PM

Quote:

Just finished my conversion from the stock SE mount to the AVX. I bought an extra counterweight, and I installed it while setting up the mount, but I suspect that with just the 8" OTA and the stock finder, that 22lbs of counterweight is overkill. Should I remove one?




I use one 11# and one 4# CW when I mount my C8 with finder and dew shield to my CG-5. I'm using the longer CGEM CW bar on the CG-5.

Stan


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rockstarbill
super member


Reged: 07/16/13

Loc: Snohomish, WA
Re: 8SE OTA conversion to Equatorial? new [Re: RTLR 12]
      #5982218 - 07/20/13 11:52 PM

I went with just the one 11 pounder and it balanced perfectly!

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tknice
journeyman


Reged: 06/02/13

Re: 8SE OTA conversion to Equatorial? [Re: rockstarbill]
      #6036081 - 08/20/13 09:35 AM

Learning a lot from this thread.. I have the SE mount and CG-5 and definitely prefer the GEM for stability, smoother star hoping, and astrophotography. I don't like the awkward positions of the diagonal compared to the SE mount. In terms of alignment, I ordered an Orion 70mm multi-finder which should ship next month--excited about that!

Do you find yourself adjusting the diagonal as much as me and also, do I need to worry about the threads of on the back of the OTA? Is there anything to put on the threads to make sure they don't wear out?


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