Steiner Navigator Pro 7x50
If you are looking for marine binoculars the German Steiner company offers you two specialized series: the cheaper Navigator and the more expensive Commander. In both cases you deal with Porro prism 7x30 and 7x50 instruments, available with or without compass built-in.
very solid; fully sealed casing; very good correction of chromatic aberration; negligible distortion; moderate coma; sharp image across almost the whole field of view; low brightness loss on the edge of the field of view
no coatings (or weak coatings) on prisms optical elements; truncated and darkened exit pupils near the very edge; interior of the tubes leaves something to be desired