Hawke Endurance ED 7x50 Marine Binoculars in Blue

The Hawke Endurance ED Marine Binoculars are 7x50 in blue, on roof prisms with a 1/4-20 tripod mount.

ED stands for extra-low dispersion glass, and it is the feature that justifies the price. Ordinary glass splits light slightly by wavelength, throwing colored fringes around high-contrast edges like a mast against sky. ED glass brings those wavelengths back together, so the image stays clean where a cheaper binocular shows purple edges.

This is the plain 7x50 without the compass, for anyone who navigates by instrument and wants the glasses for looking rather than bearing-taking. Roof prisms keep the barrels straight rather than stepped, which makes the binocular narrower and easier to stow in a console or a locker. Explore more outdoor optics and navigation.

• ED glass removes the color fringing cheaper optics show
• The plain 7x50, without the compass version's overlay
• Roof prisms keep the body narrow for stowage
• 7x50 with a 1/4-20 tripod mount