A fast focal ratio of f/4
This is especially important for astrophotographers dealing with long exposure times.
2” Dual-Speed Linear Power Focuser
The dual-speed feature has a second focus knob that has a 10:1-speed reduction to provide the super-fine adjustments even the most demanding users can appreciate.
It features paraboloidal primary mirrors made of Low-Expansion Borosilicate Glass resulting in substantially shorter cooling-down times.
Optical Design: Reflector
Optical Diameter: 205 mm
Focal Length: 800 mm
Highest Practical Power: 410x
Finder Scope: 8×50
Focuser Diameter: 2″ (50.8mm) Dual-Speed 10:1 Linear Power Focuser
Tube Weight: 9.5 kg
Tube Dimensions: 23.5cmx71.1cm
Shipping Weight: 12.7 kg
Shipping Dimensions: 80x40x44 cm3