10x42, 8x30, 7x50, magnification, lens diameter, light-gathering power, field of view and twilight factor? The figures on binoculars often look confusing at first glance, and not every pair suits every purpose equally well. All these properties can affect the price and, of course, how useful the binoculars actually are. We show you what to look out for when choosing, and which binoculars work well for the off-road trip.