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TS-Optics GSO Photon 6" F4 Advanced Newtonian Telescope with Metal Tube
Telescope optical tubes - OTA | Primalucelab.com
TS Optics GSO 8 °F/4 Large Parabolic Newtonian Telescope Lovely For Astrophotography, Optical Tube with Clamps and 8x50 finder – GSIMN8: Amazon.de: Electronics & Photo