steve55
Yellow Hammer
ok i'll keep this quick and simple.
im digiscoping with binoculars and i want to work out the specs so...
Does anyone know how to calculate the focal ratio for a pair of binoculars.
I know its focal length divided by aperture but i dont know the focal length...
All i know is the following specs:
magnification x8
objective lens 36mm
real fov 7degs
apparent fov 56.0degs
fov@1000m 122m
exit pupil 4.5mm
brightness 20.3
eye relief 20.5mm
close focus 3m
ipd 56-72mm
length 145mm
width 131mm
weight 720g
any ideas anyone?
im digiscoping with binoculars and i want to work out the specs so...
Does anyone know how to calculate the focal ratio for a pair of binoculars.
I know its focal length divided by aperture but i dont know the focal length...
All i know is the following specs:
magnification x8
objective lens 36mm
real fov 7degs
apparent fov 56.0degs
fov@1000m 122m
exit pupil 4.5mm
brightness 20.3
eye relief 20.5mm
close focus 3m
ipd 56-72mm
length 145mm
width 131mm
weight 720g
any ideas anyone?