Focal Length: 4mm (0.16in)/6mm (0.24in)/9mm (0.35in)/12mm (0.49in)/15mm (0.59in)/32mm (0.16in)/40mm (1.57in)
Apparent Field of View: 43/50 °
Eye Relief (mm): 6mm (0.24in)/5mm (0.2in)/6mm (0.24in)/8mm (0.31in)13mm (0.51in)/22mm (0.87in)/31mm (1.22in)
Number of Lens Elements: 4
Barrel Size (in): 1.25 in (32 mm)