blake
Life Member
As we all know binoculars come in all sizes and with different
magnifications.
All binoculars are expressed in equations - the magnifying power X the objective lens size. For all applications, these two numbers play an important role in determining the exit pupil - the maximum amount of light the human eye can accept (5-7mm depending on age). By dividing the objective lens (or aperture) size by the magnifying power you can determine a pair of binoculars exit pupil and match it to your eyes.During the daylight, the human eye has about 2mm of exit pupil - which makes high magnification practical. In low light or stargazing, the exit pupil needs to be more around 5 to be usable... Yet being able to steady the view also plays a critical role! At maximum magnification, any movement will be exaggerated in the viewing field. For example, a big buck spotted at 500 yards at 16X magnification is fine - until he moves.
If I missed your favorite bino please post them.
Thanks!
magnifications.
All binoculars are expressed in equations - the magnifying power X the objective lens size. For all applications, these two numbers play an important role in determining the exit pupil - the maximum amount of light the human eye can accept (5-7mm depending on age). By dividing the objective lens (or aperture) size by the magnifying power you can determine a pair of binoculars exit pupil and match it to your eyes.During the daylight, the human eye has about 2mm of exit pupil - which makes high magnification practical. In low light or stargazing, the exit pupil needs to be more around 5 to be usable... Yet being able to steady the view also plays a critical role! At maximum magnification, any movement will be exaggerated in the viewing field. For example, a big buck spotted at 500 yards at 16X magnification is fine - until he moves.
If I missed your favorite bino please post them.
Thanks!
