paul Posted March 7, 2021 Share Posted March 7, 2021 A 60mm F25-ish home brew refractor. Back in the seventies I was a 13yr old in Germany watching The Sky at Night on British Forces television. Patrick explained the basics of refracting telescopes and it all seemed simple enough. So I trotted down to the local optician and in very poor german asked for a lens with the longest focal length they had. I bought a 60mm uncut lens (the fashion was big glasses back then), focal length was around 1.5 meters . As it happens postal tubes came in 1 meter lengths and different diameters. I got two with the second one smaller to be the draw tube. I wrapped and glued string around the smaller tube until I had about 20cm in length and layered up to fit the larger one snuggly. I taped the 60mm lens at the front and put my microscope eyepiece in the end cap of the second tube. I estimate the eyepiece to have a 1-2cm focal length. Lashing this all together and balancing it on books at the window sill; I saw Moon craters but even better I saw the rings of Saturn. Sadly this was a precarious set up so I could never share what I saw. But noting my interest my parents bought me the classic 60mm store telescope that had a stirrup mount and proper tripod and things were the right way up. (400x magnification and all the CA you could want!!!) For one reason or another it took another 30yrs to get back into this hobby for about 3yrs then work changed direction and got in the way. Its taken a pandemic to give me the freedom to get me really serious about learning the skills. What was your first? 2 Quote Link to comment Share on other sites More sharing options...
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