Sky-Watcher Quattro 300P Astrophotography Reflector OTA

Sky-Watcher Quattro 300P Astrophotography Reflector OTA

Due to high demand and global product shortages due to the pandemic, please call for availability.

The fast speed of this telescope is especially important for astro-photographers dealing with long exposure times. This telescope collects light very quickly, minimizing exposure time, reducing noise, and increasing the tolerance for error. The relatively short focal length makes this telescope great for deep sky photographer, without requiring the precision of a longer focal length. Tube interiors are equipped with knife-edge ray traced baffles.

The new linear power focuser utilises 4 precision ball bearings to support the drawtube and provide great stability and zero image shift while supporting a heavy eyepiece or camera. Moving the drawtube with the roller rather than a rack and pinion ensures exceptionally smooth operation, great feel, and precise adjustability. The dual-speed feature has a second focus knob that has a 10:1 speed reduction to provide the super-fine adjustments that even the most demanding users can appreciate.

This telescope features a parabolic primary mirror made of low thermal expansion Pyrex glass, resulting in substantially shorter cooling-down times.

It comes with a impressive 0.5 mm Ultra-Thin secondary mirror supports and it offers 33% more light collecting area than the 250mm.


  • Optical Design: Newtonian
  • Mirror Coatings: 94% Aluminum
  • Glass Type: Borosilicate
  • Primary Aperture: 305mm (12")
  • Primary Edge Thickness: 38mm
  • F/Ratio: 4
  • Focal Length: 1200mm
  • Secondary Diameter: 102mm
  • Secondary Obstruction (by diameter): 33%
  • Secondary Obstruction by Area: 11%
  • Focuser: 2" Dual Speed Crayford
  • OTA Length: 1080mm (42.5")
  • OTA Outer Diameter: 362mm (14.25")
  • OTA Weight (with accessories): 25.8kg (57 lbs)

Observational Parameters

  • Dawes Limit: 0.38"
  • Rayleigh Limit: 0.46"
  • Limiting Mag.: 14.9
  • Minimum Magnification: 43X
  • Maximum Magnification: 600X
  • Light Gathering (compared to next size down): 144%


  • Included Finder: 9x50 Finder
  • Included Diagonal: No
  • Mounting Accessories: Rings/D-Rail
  • Included Eyepieces: None
  • Included Case: No
  • Corrector: No (optional)

Two year limited warranty