Binocular size

Binocular Size	7×50	8×21	8×25	8×32	8×42	8×56	10×25	10×32	10×42	10×50	10×56	12×50	15×56	20×80
Magnification	7x	8x	8x	8x	8x	8x	10x	10x	10x	10.x	10x	12x	15x	20x
Diameter of Frontlens	50 mm	21 mm	25 mm	32 mm	42 mm	56 mm	125 mm	32 mm	42 mm	50 mm	56 mm	50 mm	56 mm	80 mm
Exit Pupil Size	7.14	2.63	2.5	4	5.25	7	2.5	3.2	4.2	5	5.6	4.17	3.73	4
Twilight Factor	18.7	13	14.1	15.8	18.3	21.2	15.8	17.9	20.5	22.4	23.7	24.5	29	40
Brightness	Excellent	Poor	Fair	Great	Excellent	Excellent	Poor	Good	Great	Excellent	Great	Great	Good	Good
Details	Fair	Poor	Poor	Fair	Great	Excellent	Fair	Good	Excellent	Excellent	Excellent	Excellent	Excellent	Excellent
Measurements	Big	Very Small	Compact	Average	Very Big	Big	Compact	Average	Very Big	Big	Big	Very Big	Very Big	Extremely Big
Weight	Very Heavy	Extremely Light	Very Light	Light	Average	Heavy	Very Light	Light	Average	Very Heavy	Heavy	Very Heavy	Very Heavy	Very Heavy
General Use Quality	Good	Poor	Fair	Good	Great	Great	Fair	Good	Great	Great	Good	Good	Fair	Poor
Birding Quality	Great	Poor	Fair	Great	Excellent	Excellent	Poor	Good	Excellent	Great	Great	Fair	Good	Fair
Hunting Quality	Good	Poor	Fair	Good	Great	Excellent	Fair	Good	Great	Great	Excellent	Good	Good	Fair
Safari Quality	Good	Fair	Fair	Excellent	Excellent	Poor	Good	Excellent	Excellent	Poor	Poor	Poor	Very Poor	Very Poor
Hiking Quality	Fair	Good	Great	Good	Fair	Poor	Great	Good	Fair	Poor	Poor	Poor	Very Poor	Very Poor
Astronomy Quality	Great	Very Poor	Very Poor	Fair	Good	Excellent	Very Poor	Fair	Good	Excellent	Excellent	Excellent	Excellent	Excellent