everything from about 60m-70m up to infinity is perfectly“sharp and clear”; below, everything is increasingly blurred as you observe objects at shorter distances. One other very important aspect is that NBR rubber, especially in relation to marine uses where you will often leave the binoculars on your boat, is that it also has an excellent level of resistance to sun and heat aging and so does not harden and perish as natural rubber does. Steiner Navigator Marine Binoculars are professional binoculars for those who take their activities on the water seriously. The combination of the fairly traditional Porro prism shape and the excellent NBR rubber coating that Steiner uses on these just works. These Steiner Navigator Pro 7x30 Binoculars don't have a focus wheel, rather they incorporate a diopter adjuster on each of the eyepieces.

So whilst it may not be as luxurious as a magnesium chassis, it is more lightweight and I would suggest easily strong enough to handle most mishaps onboard. Here again, the wide field of view ensures that you are able to take in more of the onfield action at once without having to pan about and I feel their size is still compact enough for you to easily pack them away into your daysack.As I have already mentioned in the weight section of this review, for the most part, I feel that the included neck strap is excellent and I would rate it as one of the best. Indeed at this extreme, I would found it to be about 1 meter, however, this can still be very useful if you sometimes need to focus on something fairly close by. Fixed focus / always in focus binoculars like these are designed to have a very long depth of view (large hyperfocal distance) and thus it is normal for them to have a relatively long minimum close focus distance when compared to a standard focusing binocular. Its view is essentially the same, and its mechanical/ergonomic package is of a very high, modern standard. However, on water (and especially where sea spray is involved), they ensure the oculars remain dry and in optimal condition and so for my trip I took the time to thread the rain-guard onto my neck strap and so used it much more than usual.

My two most memorable encounters with models of similar size/magnification could hardly be more different from each other.At 21mm in diameter, these have pretty large ocular lenses for a mid-sized binocular in my experience.

This combined with their reasonably large exit-pupil makes this instrument very easy to use with less chance of black rings forming on the edges of the view. They are nitrogen pressure-filled (anti-fog) and waterproof to 5m, making them reliable under the most adverse weather conditions. provide bright, sharply contoured images with natural color definition for outstanding viewing quality suitable for both beginners and professionals. For astronomy, it is nice not to be constantly be playing with the centre focus wheel and the diopter to try and dial in perfect infinity .

When using the Navigator on land, it's a pity that the individual focusers turn so stiff; of course, for a marine binocular that may not be so relevant because at sea, you almost always observe at infinity. In addition, the texture has special water-repellent properties that guarantee non-slip and safe handling even in rough sea. Firstly the moderate 7x power helps make it much easier to keep the image steady and shake-free with a lower magnification, which on the unsteady platform of a boat or yacht on the water is of great importance.