PENTAX UCF Zoom II-

Robust yet compact binoculars Pentax UCF Zoom II offers exceptional performance and adjustable 8-16x magnification. It has a rubberized exterior design, which perfectly resists scratches, dust, dirt and impact. The big advantage of this telescope are Bak4 prisms and multi-coated anti-reflective lens that provides excellent light transmittance while eliminating annoying reflections. Pentax UCF Zoom II also includes easy-to-handle diopter. It's packed performance and advanced technologies. It is also compact enough so that you can take anywhere with you.
Specifications:
Optical parameters.
Type: Porro
The construction of the lens/eyepiece: 2 members in the group 1/4 lenses in 3 groups
Magnification: 8 - 16x
Objective lens diameter: 21 mm
Real field of view: 5 ° (8x) - 3 ° (16x)
Apparent field of view: 40 ° (8x) - 48 ° (16x)
Field of view at 1000 m: 87 m (8x) - 52 m (16x)
Exit pupil: 2.6 mm (8x) - 1.3 mm (16x)
Eye relief: 14 mm (8x) - 11 mm (16x)
Relative brightness: 6.7 (8x) - 1.7 (16X)
Diopter adjustment range: ± 4 m-1 (8x)
Pupil distance: 56 - 73.5 mm
Closest focus: 3 m
Other:
Prisms: Bak4
Diopter
Antireflection coatings: multi-coated
Recommended use Sport, Travel/Tourism
Design:
Color: Black
Dimensions: 55 x 111 x 111 mm
Weight: 280 g