Sky-Watcher Quattro 300P Imaging Newtonian 12" (305 mm)

Sky-Watcher Quattro 300P Imaging Newtonian 12" (305 mm) Sky-Watcher SKU: S11230 | Helix SKU: CTS11230 Overview The new Sky-Watcher Quattro Imaging Newtonian with dual-speed focuser incorporates a superb mirror-set with two significant advantages over competing products. A 2" dual-speed 10:1 ratio focuser is included for excellent focusing precision. Additionally, the tube length has been slightly shortened to optimize performance for prime-focus photography. Specifications: SKU S11230 UPC 050234112307 Optical Info Optical Design Newtonian Mirror Coatings 94% Aluminum Glass Type Borosilicate Primary Aperture (mm) 305 Primary Edge Thickness 38mm F/Ratio 4 Focal Length (mm) 1200 Secondary Diameter 102mm Secondary Obstruction (by diameter) 33% Secondary Obstruction by Area 11% Observational Info Dawes Limit 0.38 Rayleigh Limit 0.46 Limiting Mag. 14.9 Minimum Magnification 43 Maximum Magnification 600 Light Gathering (compared to