If you ask me, Scopetown made a big mistake in the design of their new 80/1200 achromat: They didn't put a modern 2" focuser on it or at least made it optional. 2" eyepieces and accesories are commonplace today and can REALLY open up the throttle on a 80/1200mm refractor, especially in deep-sky observing, but also if you want to use a binoviewer.
Certainly no, this was the purpose of my previous post when the topic was properly sorted in the Classic Telescopes section.
=> This is a dedicated planetary refractor : that has always been the purpose of the two founder, the revival of the Mizar "Kaiser" 80/1200 that was still built around 1980. This done with same tools coming back from the cellar and same people to use it.
Let's take a look at the path to the revival of this 8-cm F15 long focal length achromatic lens barrel.
A long-focus achromat refracting telescope that has disappeared recently. One of the things that made me wonder if I could revive it was that I got a Mizar "Kaiser" found at a recycle shop.
The 8-cm refracting telescope was manufactured 37 years ago°. It was a giant telescope designed with a long focal length of F15 and 1200mm to bring out the performance of the achromatic lens. At the time of sale, 8 cm diameter was a high-end model, /.../
° : wrote at the time the the company started : so about 42 years ago now.
The way it was designed and built makes it non-sense to put a 2" focuser on it. The only enlarge the adapter M36.4 Zeiss/Vixen thread / Zeiss/Vixen 24.5mm to 1"1/4 to use modern eyepieces standard
The 36.4mm thread can be used with a AH 40mm (~ Kellner with special tuned CVD) screwable eyepiece they still produce.
You can also use a M36.4 to T2 rotating adapter for bino use.
But the focuser baffle should be removed to let the clear aperture limit (27mm brings 70% vignetting) grow up to 32mm.
More diameter on the focus cause much aberration with the 80f15 objective lens design because it is strongly tuned for planetary/moon/solar use.
coma is tuned around D ray, spherical between D and C ray.