ultra compact, dual-hinge design for exceptional portability multi-coating on lens optics & prism help minimize light flare & image ghosting right eyepiece diopter ring adjusts to 5 optical degrees to perfectly tailor focus to individual viewer large center-focus dial quickly set focus includes strap, case & lens cloth pentax(r) worry-free warranty 8 x 21mm dimensions : 3. 50in x 8. 00in x 8. 00in estimated weight : 1. 3494.