Aperture: 80 mm
Focal length: 540 mm
Focal ratio: f/7
Lens design: 2 element lens (ED doublet), air-spaced
Tube material: Aluminium - CNC machined
Tube weight: 3.10 kg
Tube length: 460 mm
Tube diameter: 89 mm
Outer diameter dew shield: 103.6 mm
Focuser: ball bearing mounted 2" rack and pinion focuser
Connection eyepiece side: 1.25", 2" and female M63x1 thread
Backfocus: 123 mm from 2" receptacle / 161 mm from M63 thread