Quote:
Originally Posted by N1
I expect the 40mm aperture of the Vixens is the most efficient way to achieve their TFOV, i.e. the purpose of the large aperture here is a wide angle, as opposed to light gathering?
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Hi Mirko The 2X magnification should give a large true field of view. The 40mm aperture is just there probably to make the binoculars large enough to hold as the most aperture you will be able to utilise with young eyes is about 14mm which wouldn't look so impressive in the advertising and they would be tiny . The relationship between magnification and aperture is magnification X exit pupil = aperture and pupil maybe open to 7mm when you are young.