Nikon Monarch M7 10x42 BinocularNikon Monarch M7 10x42 Binoculars replace the Monarch 7 10x42 with some upgraded features. Chief among them are a locking diopter control and hydrophobic coatings on the outer lens surfaces. The locking diopter dial prevents the diopter from drifting when it rubs against your clothing or other objects. The hydrophobic lens coatings repel oil and water so they bead up and roll off the lens, making the binocular easier to use in wet weather and more