I got the Canon 10X30 IS. They are much lighter than conventional binoculars so the bigger magnification isn't a problem. At the time I bought them, the next size was 16 power and I believe that those are too much magnification for use on a small craft in rough water. Now anyone can play with the expensive Steiner 8X35's but these are set for my eyes and are my navigation binoculars only.@capta which brand did you buy. What power and field of vision?