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Hello everyone, I am currently using 150/750 Newton Skywatcher telescope to experiment on some self made optical device designed to be mounted on its focusing tube. This optical prototype is quite heavy for the moment so I plan to use the threaded part of the focusing tube that becomes available once you unscrew the 50.8mm (2”) adapter. ( You can see what i am talking about on the attached pictures) I'd like to know the exact standard dimensions of this threaded part so I can make/buy the right adapter for it. Has anyone already used this threaded cylinder? Would anyone have some cad drawing of it? I don't have any caliper available for the following weeks, and the standard has a high probability to be imperial, which i'm not quite familiar with (i'm writing from Europe). I would be extremely thankful for your help! 4nt4res
Hi. Finally it's time to start a project i have been planning for a while. My remote Linux - INDI observatory Some info about the project. The observatory is going to be box style. I don't do any visual stuff, so i wont make room for myself. It is going to sit on a south facing second story balcony at my parents place. It's by a fjord near Drammen, Norway, so almost everything southbound is water and zero light pollution. The house itself sits on a spot with mostly green and yellow on the LP map, so beats my apartment where there is dark red LP as far as the eye can see (sadly).. To start things off, I'm building the pillar. As it's on a balcony, there will be no way to dig and cast a base in concrete. However concrete (b30) will be used to make the pillar more substantial. I want it to be very rigid, and I guess by having some weight to it, some flex in the floor will be "pre flexed". Any project starts with a good drawing so here is some cad. The outer tube is a cardboard casting tube. It sits on a wood plate with a total thickness of about 3.6 cm, has four m20 threaded rods that will be casted in with four 50x35 cm steel angels for stability. On top there is three steel plates connecting the base to three m20 bolts with mounts for the celestron avx. I will use the celestron's plate from the tripod (removing the legs) on top to mount the head on. The gap between plate one and two from the top is to be able to adjust and level the mount. I will have to get the three plates and three blocks on the right fabricated, but hopefully at a acceptable prize, hopefully... This weekend was mostly drawing, but did get something started. Let me know what you think about the design. More to come as project progresses...