E, L or M?
The E and the L are a similar size and weight (635g and 638g respectively). The M is noticeably longer and heavier, at 722g. Unlike the other two, the M is an open-bridge design. There are optical differences, too. The L and the M include some ED glass – the E doesn’t. The M also has di-electric prism coating – this should get a bit more light through the binocular – so the image should be brighter.