Tamron Adaptall to 1.25" camera adapter

thingiverse

I remixed this design to fit a standard astronomy 1.25" eyepiece or camera to the Tamron Adaptall lenses. This makes for an incredibly cheap telescope or guide scope with high magnification. I picked up a 70-210 lens from a camera retailer in full working order for £10! As with the original design, you need to remove the Adaptall ring and screw the printed part into place. If your printer is setup well, lens or eyepiece will be a good, tight fit. If it is a little loose, I've provided some blind holes you can drill out and then use a couple of M3 x 15 screws with the ends filed smooth to hold your camera or eyepiece in place. If the fit is too tight, you may need to reduce your printed wall thickness slightly. The length of the tube is designed to correctly space the lens to the imager at around 55mm. the diameter is set to 50mm, to allow 50mm pipe clips to be used to hold the adapter if required.