Olympus Binoculars 10x21 Rc Ii Binocular

The RC II Series of binoculars sports a sophisticated design that is extremely compact and lightweight. These binoculars place an emphasis on portability and can be folded for easy transportation. - Slim & ultra compact- Elegant & stylish design- Anti-reflective lens coatingFeatures:- 10x magnification- Foldable, ultra-compact and stylish- Multi-coated lenses for maximum brightness and contrast- Convenient centre-focus knob for easy focusing- Built-in dioptric correction adjusts to individual eyesight- Optical coating- Full multi-coating- Vision convenience- Adjustable eyepieces (twist up/down)Specifications:Optics:Type:- Roof-prism seriesDiopter adjustment range:- over +/- 21/mEye relief:- 9.5mmEye interval adjustment range:- 37 - 72mmMagnification:- 10xObjective lens diameter:- 21mm ØExit pupil diameter:- 2.1mm ØActual field of view:- 5.1°Apparent field of view:- 50.0°Field of view at 1000m:- 89mRelative brightness:- 4.4Closest focal point:- 3mLens configuration:- 5 elements / 3 grou