KSON HD ED 10X50 WATERPROOF BAK-4 PHASE COATED , FMC BINOCULARS FOR BIRDING , ASTRONOMY,SIGH SEEING
 
 
Extra-Low Dispersion (ED) objective lenses provide high resolution, high contrast images that are virtually free of optical defects like chromatic aberration (color fringing)
Fully multi-coated optics deliver maximum light transmission through the optical path
Phase coated BaK-4 prisms produce vivid, true-to-life colors
Eyeglass friendly - generous eye relief and sturdy, twist-up eyecups with multiple stops
3m ' close focus
Tripod adaptable
Adjustable Pupillary 59.5-75 mm
Dimensions 6.5" x 5.33" x 2.4"
Exit Pupil 5.0 mm
Eye Cup Twist-Up
Eye Relief 18 mm
Field of View 282 ft./1000 yds.
Focus Adjustment Type Center Focus
Magnification Power x10
Near Focus 9.8 ft.
Objective Lens Diameter 50 mm
Ocular Adjustment ±4
Prism Type BaK4 Roof Prism
Relative Brightness 25.0
Twilight Factor 22.4
View Angle 5.4