What do the numbers mean when binoculars buying?
Louie Asked:
I am looking for a good set of binoculars buying for hunting. Can anyone help?
Reply:
Let's say when your binoculars buying you are looking at a pair of 10x42mm binoculars. The 10x refers to the magnification. In this case, 10x. The 42mm refers to the objective diameter, in this case 42mm. If you divide the diameter by the magnification, you get the exit pupil. In daylight your pupil is 3-4mm. You want an exit pupil no less than 3mm. 4mm is much better, otherwise you will see the edges blacken. At night, your pupil opens to at least 5mm. You want an exit pupil no less than 5mm.
The larger to diameter, the more light gathered. On a clear night, look up. You see plrnty of stars. Then look up with a x50mm pair of binoculars. It is like habing 50mm pupils. You will see many more stars, too faint to be seen with the naked eye.
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 Galileo Astronomical Binoculars Water Resistant 20x  US $95.61
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 Super Astronomical Zoom Binocular Telescope 15 180X100 US $95.88
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 Super Astronomical Zoom Binocular Telescope 15 180X100 US $57.92
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 ZHUMELL20x80mm32 GIANT ASTRONOMICAL BINOCULARS US $149.00
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 NOVA 20x80 Triplet Obj Astronomical Binoculars BNew US $155.00
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 DIA STONE 11x80 COATED OPTICS ASTRONOMICAL BINOCULARS US $99.00
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if you look into them and the people really far away look close then your good to go
Help: I just ordered the Celestron Skymaster 15×70..could you recomend a tripod ?. I will use it mainly for sky watching. Thanks for the video.
thank you for the help
I'm not familiar with the Garrett brand, but the Orion Scenix 10×50 comes highly recommended by Phil Harrington and Robert Thompson.