After trying a couple of monoculars at the Northern Optics weekend display at Barton Upon Humber, our customer chose the Helios Nitrosport 10×25 monocular. With regards optics, they were very similar to the Helios Rapide monocular, but had the benefit of better rubber armour and being water proof. They were chose to compliment their current 8×42 binoculars when out and about, as they are suitable for car glove boxes