Astronomy Specialist


$2,299.00 - Sold Out

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The SkyWatcher 300 Quattro is a Newton telescope with the super fast focal ratio of f/4. If compared with a f/5 telescope, the photographic exposure with a f/4 system is 40% shorter, making it a great time saver. This instrument is ideal for astrophotography and it will deliver sharp images across a large flat field when used with the SkyWatcher aplanatic coma corrector.

The 2" Crayford focuser is solid, precise and backlash free. It operates at two speeds due to the 10:1 reduction mechanism for an extra fine focusing adjustment, which is paramount for astrophotography and high resolution observations.

The secondary mirror is oversized in order to have a fully illuminated field and to avoid any vignetting. It is collimable by using 3 grub screws and the offset can be adjusted by using the central spring loaded screw.

The primary mirror sits on a 9 points cell and is collimable with 3 pairs of push & pull screws. 

Both mirrors are made in borosilicate glass which have low thermal expansion coefficient. That means that the precise optical surfaces of the mirrors remain the same while the glass will cool down. 

The aluminium tube is internally blackened to avoid internal reflection, enhance contrast and to absorb stray light.



Optical design

Newton reflector

Objective diameter

300 mm

Focal length

1200 mm

Focal ratio


Secondary mirror

102 mm (minor axis)

Linear obstruction

34 %

Resolving power

0.40 arc second

Stellar limiting magnitude


Max. magnification

600 x

Light gathering power

1837 times the human eye

Mount attachment

Tube rings on Losmandy style bar


Crayford dual speed (10:1)

Tube weight

15.1 kg

Tube length

1090 mm

Tube diameter

350 mm





  • Newton Quattro 300 f/4
  • Tube rings on Vixen style bar
  • 8x50 finderscope
  • 2" tube extension for 2" eyepieces
  • 2" to M42 and 2" to 1.25" adapter
  • Piggyback 1/4" screw with camera locking nut
  • Eyepiece not included
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