Telescopio Dobson Nadirus 16 – Geoptik

Descripción

TECNICAL SPECIFICATION

Type                 –             DOBSON TRUSS
Code                –             10A204
EAN13-GS1      –             8058450361884
Optical design  –             Newtonian
Clear aperture  –             404 mm (16”)
Focal length      –            1815 mm
Fopcal ratio       –            f/4.5
Secondary mirror –         88 mm (3.5 inch)
Mount type          –         Wood Dobsonian
Primary cell         –         18 point floating aluminium maschined
Secondary holder   –       Hight precision aluminium assembly
Focuser                 –       Dual speed rack and pinion 2″+1.25″ low profile.
Alignment              –      Manual
Finder                    –      Not included
Radius altitude bearings diam. –  540 mm
Truss tubes  –  Powder painted alu.tubes diam. 22mm with plastic balls.
Alt movement           –    By teflon
Azimuth movement –     By teflon
Mirror box weight     –   10.6 Kg.
Rocker box weight    –   8.4 Kg.
Cage with focuser weight  – 4 Kg.
Tubes weight            – 4.3 Kg.
Total assemble telescope weight –  41.6 Kg.
Heaviest part –         24,4 Kg.
Eyepiece height (zenith) –  1720 mm

Primary mirror: BK7 with correction of greater than 1/5 lambda(PTV), 91% reflectivity with protective treatment (SiO2)
Secondary mirror: 91% reflectivity with protective treatment (SiO2), correction of more than 1/4 of the lambda (PTV)