On 11/10/2015 4:04 AM, Chuck Norcutt wrote:
....
The lesson is to not choose something large and heavy like 7x50 binoculars if your usage is going to be in bright
daylight. 7x50 binoculars are called "night glasses" since they produce a 50/7 = 7mm exit pupil. But if you're using
them in bright daylight your pupil diameter is only 3mm. You can get a 3mm exit pupil from a 7x21 binocular which in
much smaller and lighter and the image will be just as bright.
Which is why the binoculars in my lens and accessory bag are 8x25 = 3 mm exit pupil. Way smaller and lighter than the
'serious' pair, but within a gnat's eyebrow of the same IQ in good light.
Eyes Front Moose
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What if the Hokey Pokey *IS* what it's all about?
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