Pentax Binoculars, UCF R, Ultra Compact Binoculars, 210g 

8x21 UCF R

10x21 UCF R

Prism

Porro 

Porro 

Focus

Centre

Centre

Magnification

8

10

Obj. Lens

21

21

Exit Pupil

2.6

2.1

Brightness

6.7

4.4

Eye Relief

13.0

9.5

Focus  Range

2.8mtrs

2.8mtrs

Field of view @ 1000mtrs

108

87

Height (mm)

83

80

Width (mm)

110

110

Weight

210g

210g