Hawke Endurance 10x42 Binoculars Extra-low dispersion glass Enhanced light transmission Close focus: 6.6 feet Twist up eye cups with position stops High-resolution phase-corrected BAK-4 prism Stay-on lens covers Nitrogen purged Length: 5.8" Width: 4.3 - 5 inches Weight: 24.9 ounces FOV: 330 feet @ 1,000 yards Eye relief: 0.6" H5 Optical system Objective lens: 42mm Magnification: 10x Eye cups: twist up Diopter type: Right eye Tripod mount: Yes, A 1/4 20 UNC