The exit pupil – the size of the image as it leaves the eyepieces – is 5mm, which is a little on the small size. However, it can be argued that this really isn’t an issue, for two reasons:
1. Larger exit pupils produce a brighter image under low-light conditions, but with an aperture of 35mm, these G2’s are not really meant to be used under such conditions anyway.
2. Although everyone is different, most people’s eyes will dilate to about 7mm. If your binoculars produce an exit pupil larger than that, part of the image will be lost. With an exit pupil of 5mm, you shouldn’t have that problem with this G2.
Eye relief is an important consideration if you wear glasses, as it indicates the distance you can hold the binoculars away from your eyes and still see the entire field of view. The average eye relief for binoculars is 17mm, so at 13mm, these G2’s fall a little short. This probably won’t matter too much if you don’t wear glasses, but if you do, you’ll need to take this into consideration.