High Grade Dobsonian 500

The humble Dobsonian 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.

These Dobsonians are built around our corrected newtonians. The specifications are idential but a high quality dobsonian mount is included.

Price (Excl.VAT)


Aperture (mm)500
Integrated mountAlt-Az
Tube tubeTruss
Focal length (mm)2000
Tube length (transport)1500
Tube length (operating)1800
OTA Weight (kg)45
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 cell18 point floatation cell
Primary mirror edge support6 point athermalised
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