Optical Tube Assembly

Sky-Watcher Explorer-200P 200mm (8") f/1000 Parabolic Newtonian Reflector Optical Tube Assembly

QUATTRO series with their fast f4 focal ratios, have been specially designed for high quality astrophotography with short exposure times

The new QUATTRO series with their fast f/4 focal ratios, have been specially designed for high quality astrophotography with short exposure times. They are of course also fine telescopes for visual observations. Tube interiors have knife-edge ray-traced baffles.

150mm (6") f/1200 Parobolic Newtonian Reflector Optical Tube Assembly
0.5mm ultra-thin secondary mirror supports to reduce diffraction spikes and light loss
High quality Paraboloidal primary mirrors to eliminate spherical aberration.

The new Skywatcher Explorer-150P features a 1.25" 10:1 ratio focuser for enhanced focus control and a shorter tube length with the secondary mirror positioned closer to the primary mirror for more convenient prime-focus photography

The Sky-Watcher EXPLORER-150PDS Newtonian Reflector incorporates a Dual-Speed 10:1 ratio focuser for excellent focusing precision

A Dual-Speed 10:1 ratio focuser is included for excellent focusing precision. Also the tube length has been slightly shortened to optimise performance for prime-focus photography

The new Sky-Watcher EXPLORER-130PDS Newtonian Reflector incorporates the same superb mirror-set as the Explorer-130P Black Diamond Series. A Dual-Speed 10:1 ratio focuser is now included for excellent focusing precision

254mm (10") f/4.7 Parabolic Dual-Speed Newtonian Reflector OTA 

Fast f/4 focal ratios, have been specially designed for high quality astrophotography with short exposure times. They are of course also fine telescopes for visual observations