Pentax Binoculars, PCF, Specification 

8x40 PCF WP  II

10x50 PCF WP  II

12x50 PCF WP  II

20x60 PCF WP  II

Prism

Porro

Porro 

Porro 

Porro 

Focus

Centre

Centre

Centre

Centre

Magnification

8

10

12

20

Obj. Lens

40

50

50

60

Exit Pupil

5.0

5.0

4.2

3.0

Brightness

25.0

25.0

17.4

9.0

Eye Relief

20.0

20.0

20.0

21.0

Focus  Range

3.5mtr

5.5mtrs

5.5mtrs

8.0mtrs

Field of view @ 1000mtrs

110

87

73

38

Height (mm)

136

178

178

224

Width (mm)

178

183

183

195

Weight

802g

972g

984g

1280g