*  Item : 350S, 350R, 350L, 350XL

*  Power: 3.5X 

*  Working distance: 340mm(S),420mm(R),500mm(L),550mm(XL) 

*  Depth of view: 60mm (S); 80mm (R); 90mm (L); 100mm(XL)

*  Field of View: 55mm (S); 60mm (R); 65mm (L); 70mm(XL)

*  Weight: 52g

*  Frames: Ni-alloy or Titanium