Pentax 8-16x21UCF Zoom with Case

    
Within its compact body is Pentax's original in-line control system for excellent maneuverability during viewing. The 8-16x21 UCF Zoom's in-line control system positions zooming, focusing and diopter adjustment mechanisms in a straight line so users can control zooming without taking their eyes off the eyepieces.

      
FEATURES:

• Magnification power range from eight to sixteen.
• Zoom optics, with aspherical lens elements in the eyepiece, assure edge-to-edge sharpness over the entire viewing field.
• Unique, attractive, ergonomically functional body design.
• Innovative in-line control system positions zooming, focusing and diopter adjustment mechanisms in a straight line.
• The extra-long 14mm eye relief results in fatigue-free viewing for eyeglass wearers.
• High-refraction BaK4 glass prisms produce a perfectly round exit pupil offering clear images over the entire field of view.
• For close-up observation, the minimum focusing distance is only 9.8 feet.
• Eyepiece rings slide in and out effortlessly for viewing by eyeglass wearers.
• The diopter adjustment knob, stored inside the focusing ring when not in use, pops out with a light push . . . avoiding accidental shift during focusing.
• Solid "uni-body" design prevents loss of optical alignment.
• Convenient "quick strap" attaches easily to binoculars.
• Special rubber housing protects the optics and inner mechanism from shock and damage.
• Like all Pentax binoculars, the 8-16x21 UCF Zoom comes with a limited lifetime warranty, case, lens caps and strap.

• Type:Inverted porro-prism, center focusin, center zooming (linked dual axis).
• Lens Construction:Objective Lens: 2 elements in 1 group,Eyepiece Lens: 4 elements in 3 groups
• Magnification:8X-16x
• Objective Lens Diameter:21mm
• Real Field of View:5 (8x) - 3 (16x)
• Apparent Field of View:40 (8x) - 48 (16x)
• Field of View at 1000m:87m (8x) - 52m (16x)
• Field of View at 1000 yds.:261 ft. (8x) - 156 ft. (16x)
• Exit Pupil:2.6mm (8x) - 1.3mm (16x)
• Eye Relief:14mm (8x) - 11mm (16x)
• Relative Brightness:6.7 (8x) - 1.7 (16x)
• Diopter Adjustment Range:+/-4 Diopter
• Eye Distance Adjustment Range:56mm - 73mm
• Focusing Range:1.9m - infinity (9.8' - infinity)
• Eyepiece Ring:Slide Type
• Body Color:Black & Gray
• Dimensions:108x115x61mm (4.3x4.5x2.4in.)
• Accessories:Eyepiece Lens Cap, Case, Neck Strap