Sky-Watcher Classic 150P

The Sky-Watcher Classic Dobsonian Telescope 153mm/1200mm (6") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. In addition, this models include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This models also include the new feature-tension control handle.   Optical Info Optical Design Newtonian Mirror Coatings 94% Aluminum Glass Type Borosilicate Primary Aperture (mm) 152 F/Ratio 7.9 Focal Length (mm) 1200 Secondary Diameter 34mm Secondary Obstruction (by diameter) 16% Secondary Obstruction by Area 3% Observational Info Dawes Limit 0.77 Rayleigh Limit 0.93 Limiting Mag. 13.4 Minimum Magnification 21 Maximum Magnification 295 Light Gathering (compared to next size down) 40% General Info Focuser 2" R&P OTA Length (Retract/Ext.) 44.5" OTA Outer Diameter 7.12