![]() All bores for primary mirror cell, secondary mirror, finder, focuser and front ring are drilled. ![]() Complete carbon composite tube with all necessary bores for your GSO Newtonian or Photon Newtonian with 8" aperture f/5. These telescopes are well usable for for astrophotography, with a decent tube and also with a good focuser.Teleskop-Express TS-Optics Carbon Composite Tube TS-Optics Carbon Composite Tube Upgrade for GSO and Photon 200 mm f/5 Newtonian. The supports of the main and the secondary mirror are solid, too. The economically priced Newtonian telescopes from Skywatcher and Celestron are equipped with good optics. TS Optics Carbon Tubus Upgrade for Celestron and Skywatcher 150mm f/5 Newtonian telescopes. Teleskop-Express TS-Optics Carbon Fiber Tube Upgrade for Teleskop ETS Carbon Tube Upgrade for Skywatcher
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