Yours is the tripod setup I want to put together! Is that the Gibraltar or Panoramic mount that you have it on? I have the Panoramic with SkyTour and I need to find the right ring to hold the SW100 firmly in place to use. I bought an older TV clamshell and lined it with some high- density foam but the foam loses some mass in the colder evenings and doesn’t hold it firmly. I want to be able to swap it out with my Pronto when I want to punch through to some deeper DSOs
Hi Grounddweller, Welcome to Cloudy Nights and thanks for sharing the picture of your sweet scopes!
To answer your question, I use a Gibraltar5 mount with my ED100Sf and Tele Vue 4-inch Rings!
My original plan was to get a TV-102, but it was discontinued before I got a chance to buy one, so I purchased the Vixen ED100Sf f/9 instead to fill its place with the hope that someday I would find a nice, used TV-102 and I would simply switch scopes and use all the accessories acquired for the Vixen on the Tele Vue. That’s why I didn’t mind about splurging for a TV 4” Mount Ring Set for 4-inch outside diameter tubes (MRS-4011) and Quick-Release Finder Mount (QFM-1008) for my modest ED100Sf scope. In order to fit 102mm I.D. rings on a 100mm O.D. tube, I added an extra layer of thick self-adhesive felt (sold for furniture) to the rings and they worked perfectly! In the 5 years that have elapsed since I installed the rings, they are as tight on the scope as day one, no slippage at all. IMO a 4” clamshell ring, even the one made by Tele Vue for TV scopes, is not ideal to hold firmly a long focal length refractor like the TV-102 (for high magnification observing), or a SW 100ED for that matter, and it would be better served by a 4” Mount Ring Set. Even if I was never able to purchase the TV-102 that I wanted, I’m happy that I got the TV rings for my ED100Sf and I’m very pleased using this scope on my Tele Vue mount for casual planetary and double star observing!
Here are a couple of links for the Tele Vue 4” Mount Ring Set:
Here is also a link to an old post that I made when I upgraded the rings of my ED100Sf to use the scope on my Gibraltar5 Mount:
I think that with the correct mounting plate, you could use the rings that you already have for your SW 100ED on a Tele Vue mount. For example, you could just order a Tele Vue Gib-5 Bottom Plate (BPL-1098, also known as NP127 Bottom Plate) that normally comes included with the TV Ring Sets and is pre-drilled for TV scopes and mounts, attach your rings to it with single 1/4”-20 cap screws and then place the scope with rings and plate on the top of the cradle of a TV Gibraltar Mount and fasten it with 1/4”-20 hand knobs (included with the mount). Here are a couple of links for the TV Bottom Plate:
Regarding the mount, I’m sorry to be the bearer of bad news, but IME a TV Panoramic mount would not be sufficiently stable for observing with a 100ED f/9 refractor. I use a TV-85 scope on a Panoramic mount all the time and I feel that the mount is already at the limit for optimal viewing! If you want to use your scope on a Tele Vue mount, I would strongly recommend a Gibraltar5 mount as an effective viewing platform -a regular Gibraltar (HD4) mount would probably be the minimum acceptable mount from Tele Vue for your scope. Here are some links to posts that I have written about my Gibraltar5 and Panoramic mounts where you can also find more pictures of the ED100Sf setup on the TV mount:
This is probably not what you wanted to hear, but I prefer to be honest with you so you don’t incur in expenses that you might regret later!
Best of luck and please let me know if I can help!