Corrected Newtonian 300

400 mm f2.5 widefield - 6 micron spots

The humble Newtonian telescope, done properly. These instruments are for amateurs who have outgrown their mass produced telescope. Our newtonian telescopes feature 1/8th PTV optics and an integrated corrector.

Each corrected newtonian is available in two speeds, f/4 or f/7. This gives a choice between relatively fast deep sky or a slower system with higher native magnification for smaller DSO’s or lunar/solar/planetary observations.

Price (Excl.VAT)

3699

Aperture (mm)300
Recommended mount typeGEM
Tube tubeClosed
Focal length (mm)1200
Tube length (transport)800
Tube length (operating)1000
OTA Weight (kg)17
Back focus150
Focal ratio F/4
Fully corrected imaging circle (mm)50
Cooling fansPrimary and secondary mirror
AirflowLaminar flow & Rear
Mirror coatingsEnhanced Aluminium + SiO2 protective layer
FocuserDual speed JTW Rhino
Tube constructionCarbon fiber
Optical surface quality (Strehl, PTV)0.97, 1/10
Primary mirror substrateSchott Supremax 33
Primary mirror cell9 point floatation cell
Primary baffleOTA baffles
Secondary mirror substrateSchott Supremax 33
Secondary mirror cell3 point RTV
CorrectorIntegrated 2-element
BoltingA4 Stainless steel
Metal protectionDual
Surface treatmentAluminium – 20 micron hard-coat anodising
PaintExterior grade powdercoat (environmentally friendly)
Anti dew systemOptional