Original William Optics Zenithstar 110mm f/7 Refractor
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I'm the original owner of this Zenithstar. The triplet objective lens was designed by the legendary Thomas M. Back. Many people have praised these refractors. It has a high quality 2" focuser with coarse and fine focus.
I added two mounts for a finderscope and an ASIAir near the focuser, using a worm-drive hose clamp.
In addition to the telescope, I will include a Vixen-type base with two sturdy rings that you can see in the photo. And a very heavy-duty ring with a platform on top for mounting a camera piggyback on the Zenithstar. This has a 1/4 20 thread and knob like a good photo tripod. See my Canon camera and long telephoto mounted in the photo. You can have your camea co-axial with the refractor this way. I will include a small weight that slides along the tube to easily adjust for weight changes at the eyepiece. I will include the original aluminum carrying case and owners manual.
I find the Baader Planetarium Flip-Mirror that I also have for sale on Astromart extremely useful with this telescope. I flip back and forth from visual obervation to imaging and both are in focus.
I also will include a William Optics 2" diagonal. The diagonal has a mark on the mirror where an eyepiece went in too far and marked it. The mark is off axis. Also one of the diagonal's tubes is slightly loose. So I would not call the diagonal excellent but I'll include it.
This telescope has been to eclipses on 4 continents and shown planets and open clusters to hundreds of students. A short video taken with it at the 2024 solar eclipse is at
my home page (Google Astronomer Doug Duncan to find me) and add 2024EclipseDuncan.mp4 to the home web address.
A similar used refractor is for sale at Agena for $2195. I think mine is a better deal since it includes extras and is original owner.
I also am advertising a German Aluminum GPII-DX Altazimuth mount on a Husky Quick Set camera tripod, with rings that fit this telescope, for $199. This is a very lightweight but sturdy and smooth setup that can be easily carried around and set up almost instantly. I used it with the refractor to identify a UFO that appeared over Colorado in 2024, that turned out to be a Loon high altitude balloon. That the mount sets up in seconds allowed catching the Loon in the telescope. If you buy the ZenithStar and want the altazimuth mount, I will include it for $100.
[I am the inventor of the Solar Snap eclipse app for phones, and the leader of an eclipse trip to Gibraltar in 2027 for those who think the Egyptian desert in August is too hot!!]
I added two mounts for a finderscope and an ASIAir near the focuser, using a worm-drive hose clamp.
In addition to the telescope, I will include a Vixen-type base with two sturdy rings that you can see in the photo. And a very heavy-duty ring with a platform on top for mounting a camera piggyback on the Zenithstar. This has a 1/4 20 thread and knob like a good photo tripod. See my Canon camera and long telephoto mounted in the photo. You can have your camea co-axial with the refractor this way. I will include a small weight that slides along the tube to easily adjust for weight changes at the eyepiece. I will include the original aluminum carrying case and owners manual.
I find the Baader Planetarium Flip-Mirror that I also have for sale on Astromart extremely useful with this telescope. I flip back and forth from visual obervation to imaging and both are in focus.
I also will include a William Optics 2" diagonal. The diagonal has a mark on the mirror where an eyepiece went in too far and marked it. The mark is off axis. Also one of the diagonal's tubes is slightly loose. So I would not call the diagonal excellent but I'll include it.
This telescope has been to eclipses on 4 continents and shown planets and open clusters to hundreds of students. A short video taken with it at the 2024 solar eclipse is at
my home page (Google Astronomer Doug Duncan to find me) and add 2024EclipseDuncan.mp4 to the home web address.
A similar used refractor is for sale at Agena for $2195. I think mine is a better deal since it includes extras and is original owner.
I also am advertising a German Aluminum GPII-DX Altazimuth mount on a Husky Quick Set camera tripod, with rings that fit this telescope, for $199. This is a very lightweight but sturdy and smooth setup that can be easily carried around and set up almost instantly. I used it with the refractor to identify a UFO that appeared over Colorado in 2024, that turned out to be a Loon high altitude balloon. That the mount sets up in seconds allowed catching the Loon in the telescope. If you buy the ZenithStar and want the altazimuth mount, I will include it for $100.
[I am the inventor of the Solar Snap eclipse app for phones, and the leader of an eclipse trip to Gibraltar in 2027 for those who think the Egyptian desert in August is too hot!!]
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