Magnification = objective lens focal length/eyepiece focal length.
Brand: SKY ROVER Coating: Fully multi-coated
Focal Length: 9mm Edge coating: edge blackened to control stray light
Eye Relief: 15mm FOV: 100 Degrees
Exit diaphragm (diameter): 15.7mm Size: 55x160mm (WxH)
Optical structure: 9 elements in 6 groups Net Weight: 830g
Interface size: 1.25-inch and 2-inch interfaces, with standard 1.25-inch and 2-inch filter threads