Is that an original double Fluorite FSQ-106, or the same with the sliding dewshield (FSQ-106N) ? I take it that it is not any kind of FSQ-106 ED where they got rid of the Fluorite? My friend has an original FSQ-106 and he had endless problems coming to focus with eyepieces and nearly always used a 1.6x Extender-Q, but it looks like you are using the scope without the Extender-Q and manage to get to focus? How do you find using your scope with eyepieces in general? Are there problems bringing eyepieces to focus? What is the length of the focuser travel ?
Regards.
Yes, it's the first version of the FSQ-106 with the double fluorite lenses. I had PreciseParts.com make me an adapter that screws into the front of the Tak 2" mirror diagonal and Turret prism diagonal in place of the nosepiece. It allows much more focus range. With the Turret diagonal in this configuration, pretty much everything will come into focus. With the 2" Tak mirror diagonal, I've found that I'm still limited to an upper end of 30mm, and that's also dependent upon which 2" eyepiece you use (a 30mm 2" Brandon will come to focus). For example, a 17mm Ethos might come to focus, but a 21mm Ethos will not. I've used the 13mm (41x), 10mm (53x), and 8mm (66x) Ethos eyepieces with no problem. To me, the 10mm Ethos (53x) provided the nicest views. For example, the Orion Nebula, the Pleiades, and various star clusters each fit within the FOV and the magnification seemed just right. For a full range of powers low to high, the Turrent is handy. I think I may get another adapter made that I can pair with my 2" Zeiss Astro-Amici prism diagonal. That should allow most 2" eyepieces (low and high powers) to come to focus. Or, you can use the 1.6x Extender with 2" adapter (from Tak) and you'll be all set. The C2X coupled to the 1.25" prism diagonal also works really well. I hope this is making sense.
V/R
Terry
Edited by TerryWood, 02 April 2025 - 12:41 PM.