Pentax 10x21 UCF R

Weight: 210 g
Brand: Pentax
Description: Type: binoculars, magnification: 8 x, lens diameter: 22 mm, exit pupil diameter: 2.75 mm, functions: pupillary distance adjustment, features: case/pouch included, design: retractable eyecups, multilayer
Width: 110
Height: 47
Type: Binoculars
Length: 78 mm
Lens diameter: 21 mm
Exit pupil diameter: 21 mm
Minimum focusing distance: 2.8 m
Field of view at a distance of 1000 m: 87 m
Increase: 10 x
Angular field of view apparent: 50°
Angular field of view real:
Eye relief: 95 mm
Diopter adjustment: ±4D
Prism material: BAK-4
Interpupillary distance max.: 72 mm
Interpupillary distance min.: 58 mm
Relative brightness: 4.4
The Twilight Factor: 14.5
Prism type: Porro
Number of groups of optical elements: 3
Number of optical elements: 5
Focusing: Central