Pentax 8.5x21 Papilio

Weight: 290 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: 55
Type: Binoculars
Length: 116 mm
Housing material: Plastic
Lens diameter: 21 mm
Exit pupil diameter: 25 mm
Minimum focusing distance: 0.5 m
Field of view at a distance of 1000 m: 105 m
Increase: 8.5 x
Angular field of view apparent: 5.1°
Angular field of view real:
Eye relief: 15 mm
Diopter adjustment: ±4D
Interpupillary distance max.: 74 mm
Interpupillary distance min.: 56 mm
Relative brightness: 6.3
The Twilight Factor: 13.4
Prism type: Porro
Number of groups of optical elements: 6
Number of optical elements: 7
Focusing: Central