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Equipment Discussions >> Classic Telescopes

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Sasa
professor emeritus


Reged: 11/03/10

Loc: Ricany, Czech Republic
Classic mount with modern refractor new
      #6077339 - 09/12/13 04:00 PM

Hello,

I can now mount my Sky Watcher 100mm ED to Zeiss T-Mount which originally came with Telementor (click on image to get large version):



Need to check it under the stars yet. But it should work, 100ED has the focus only 6cm longer. And the weight of the tube is just a little bit over the Telementor's tube. It can still be balanced with one conterweight. I do not know why, but ED100 seems to be much bigger than Telementor although the measures are almost the same.

Should be a sweet combo, I can still easily lift the setup and navigate through the doors to my backyard. And ED100 reaches just one magnitude deeper than Telementor. It counts from light polluted site as is my backyard.

BTW, do you know why Zeiss picked up a diameter of 63mm for their Telementor lens? The only thing that came to my mind is that it reaches exactly one magnitude less than 100mm telescope. The ratio of lens areas is 2.52, and the difference in light intensity for two stars one magnitude apart is 2.51. Could this be a reason for 63mm diameter? Or is it just 2.5in size (63.5mm)?


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Mike E.
Carpal Tunnel


Reged: 01/26/10

Loc: Moonstone Observatory
Re: Classic mount with modern refractor new [Re: Sasa]
      #6077378 - 09/12/13 04:31 PM

Nice!

Having recently acquired a TM-Mount, I now have a spare T-Mount. As the Zeiss GEM also works great in alt/az mode, I would like to use it for our Intes Micro 127mm mak, and also a 60mm Carton refractor we have.
It's difficult to find the right size dovetail to use with the T-Mount here in the UK. I understand Astro Physics used one of a similar size for their Traveler Scope, which is no longer made. Did you have a special dovetail made to use with the Skywatcher rings ?


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Sasa
professor emeritus


Reged: 11/03/10

Loc: Ricany, Czech Republic
Re: Classic mount with modern refractor new [Re: Mike E.]
      #6077424 - 09/12/13 05:04 PM

Hi Mike,

yes, this is a special dovetail plate. My brother made it for me. Normally, I'm using ED100 on AZ5 alt-az mount but I started to like Telementor with its equatorial mount more and more, so I wanted to have an option to use it with my larger scope. What I like on Telementor is that with simple 1 minute mount alignment I can effectively use the declination setting circle to find the targets (first, I use water-level to level the mount, then I just set the declination of Arcturus, +19deg, and I move the mount in RA and around the main pole in such a way that Antares is in the middle of the FOV).

When I'm looking for an object, I just set its declination and then I just roughly point the telescope to it. I can usually very quickly identify the star field using Uranometria 2000.0. This works very well for me in light polluted sky even without finder.

Alexander

Edited by Sasa (09/13/13 05:27 AM)


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Don Taylor
sage


Reged: 07/12/09

Loc: South TEXAS
Re: Classic mount with modern refractor new [Re: Sasa]
      #6077979 - 09/12/13 11:17 PM

sounds good to me! I do the opposite and put a (near) classic telescope on a modern mount: (A-P Achro guidescope ~Nihon-Seiko 1987 on a recent Vixen GP2+HAL130)

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nightfisher
super member


Reged: 11/06/11

Loc: Huddersfield UK
Re: Classic mount with modern refractor new [Re: Don Taylor]
      #6078158 - 09/13/13 02:15 AM

I have done this other way round, swift 839 OTA on modern supa track mount

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Sasa
professor emeritus


Reged: 11/03/10

Loc: Ricany, Czech Republic
Re: Classic mount with modern refractor new [Re: nightfisher]
      #6078236 - 09/13/13 05:36 AM

Have it the other way around as well. My AS110 is riding on Losmandy G8 in my observatory: http://www-hep2.fzu.cz/~kupco/astro/equipment/AS110/as110_firstnight.jpg

Since last summer I was left at home with only alt-az option for my larger refractors. Now I can run ED100 on equatorial mount again. I think it will be a great help for the upcoming Jupiter season. It really helps when you need to touch the mount just in one direction during making a sketch.


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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Classic mount with modern refractor new [Re: Sasa]
      #6078405 - 09/13/13 09:30 AM

I have recently done the same thing and bought a set of rings and a rail for my Sears 6344 3inch F16 so that I can put it on my Vixen Porta II mount with wooden legs. It's a great grab and go combination and looks good too.

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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor [Re: terraclarke]
      #6078453 - 09/13/13 10:09 AM

I recently acquired a Celestron 102GT refractor (one of the tube assemblies that OPT was selling for $60), and placed it on an extended pier mount with an old Edmund equatorial head. Works great.

Fred


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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084038 - 09/16/13 02:19 PM Attachment (13 downloads)

Here's a photo of the combination new scope/old mount... the 102GT now sports Edmund colors, and the 1970's Edmund GE mount rides on a custom 5' extended pier for ease of use while standing:

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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084039 - 09/16/13 02:20 PM Attachment (10 downloads)

Another view:

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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084040 - 09/16/13 02:21 PM Attachment (12 downloads)

Looking skyward:

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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084042 - 09/16/13 02:22 PM Attachment (11 downloads)

The Magic of Krylon...I like it:

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greju
Carpal Tunnel
*****

Reged: 10/13/05

Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084046 - 09/16/13 02:24 PM

Nice "Edmundesque" paint job!

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Sasa
professor emeritus


Reged: 11/03/10

Loc: Ricany, Czech Republic
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084156 - 09/16/13 03:22 PM

Very nice setup up. Indeed. I like to color as well.

BTW, I just had quick look on Moon yesterday. The weather was bad, haze around Moon, clouds, and it was clear that it will be just worse with time.

Still the view through ED100 with TMB16+TV2.5x (141x) was very nice. The combo is usable but little bit shaky. Luckily, the OTA is equipped with dual speed Crayford and I can focus with just light touch. Otherwise I would not be probably able to focus properly at all. Although the scope is just a little bit longer and heavier than Telementor's OTA, the difference is unfortunately quite large.


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rdandrea
Carpal Tunnel
*****

Reged: 06/13/10

Loc: Colorado, USA DM59ra
Re: Classic mount with modern refractor new [Re: Sasa]
      #6084184 - 09/16/13 03:38 PM

Nice work. But with the extra leverage of that extended pier, I'd be sandbagging the legs.

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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor new [Re: rdandrea]
      #6084251 - 09/16/13 04:16 PM

Thanks, guys! I initially thought that I'd need sandbags too, Ralph, but it's actually quite steady, given it's height... a set of anti-vibration pads takes care of what little shakiness there is, and the image settles down in a couple is seconds at most. I may eventually shorten the pier by a half a foot or so, but it's nice to be able to view while standing, and to be able to get under the scope without too much neck-twisting.

Fred


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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084315 - 09/16/13 04:57 PM

Looks great Fred. Perfect paint job. It looks very sporty!

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amicus sidera
Post Laureate
*****

Reged: 10/14/11

Loc: East of the Sun, West of the M...
Re: Classic mount with modern refractor new [Re: terraclarke]
      #6084329 - 09/16/13 05:06 PM

Thanks, Terra! That red-and-tan combination just makes me happy...

Fred


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SpaceNetworks
super member
*****

Reged: 04/21/13

Loc: California
Re: Classic mount with modern refractor new [Re: amicus sidera]
      #6084343 - 09/16/13 05:12 PM

Inspired idea, nice execution, looks great! Coolest Celestron 102GT I think I've seen. Congratulations.

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terraclarke
Post Laureate
*****

Reged: 05/29/12

Loc: Just South of the Mason-Dixon ...
Re: Classic mount with modern refractor new [Re: SpaceNetworks]
      #6095363 - 09/22/13 04:46 PM Attachment (4 downloads)

Here's a classic scope on a modern mount. My Sears 6344 on my Omni CG-4 GEM. Sometimes its fun to have the scope driven, in which case I take it off of its native GEM and put it on this one. Such was the case today for a little solar viewing with the Lunt solar wedge.

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