Quote:
Originally Posted by Satchmo
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.
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Hi Mark that would be quite neat actually. Imagine a pair of 2x14s for your shirt pocket
Would they need more strongly curved lenses perhaps?
John, I think what Mark means is that with an iris opening of 7mm, you'd be using 14mm of the 40mm, because aperture divided by power equals exit pupil. I won't comment on the bino effects because I don't know a lot about binoviewing. Steve et al. might be able to help.