Konus Optics KONUSREX 10x42mm Binocular

The Konus Optics KONUSREX 10x42mm binocular delivers the optical clarity and light-gathering power serious hunters, birders, and outdoor enthusiasts need for long days in the field. Built on Konus's reputation for precision optics at accessible prices, the KONUSREX series combines professional-grade coatings and premium glass to produce the kind of bright, sharp images that let you see detail at distance—whether you're glassing a distant ridge, tracking movement in low light, or scanning open water.

What sets the KONUSREX apart is its optical engineering. The Silver Mirror Coating treatment achieves up to 96 percent light transmission, meaning more of the available light reaches your eye instead of bouncing away. The fully multi-coated lenses work with Phase Correction technology and BAK-4 prisms (the professional-grade standard) to eliminate the haze and color fringing that cheaper optics can't escape. The result is resolution and contrast you can trust when the stakes matter.

The 10x42mm configuration balances magnification and light gathering for versatile use across terrain and seasons. Nitrogen filling keeps internal surfaces fog-proof in wet conditions, while the rubber-armored, waterproof construction handles the abuse of real field use. The generous eye relief, large eyepieces, and open-hinge central focus wheel are designed for extended comfortable viewing—no eye strain after hours of glassing. At a genuinely light weight, these binoculars won't burden your pack or your neck during a full day afield.

Key Features

• Silver Mirror Coating for up to 96% light transmission
• Fully multi-coated lenses with Phase Correction
• Professional BAK-4 prisms for superior image quality
• Nitrogen-filled, waterproof construction
• Large eyepieces and long eye relief for comfortable extended use
• Rubber-armored central focus design
• Lightweight for all-day pack carry

Specifications

Frequently Asked Questions

What does 10x42mm mean on binoculars?

The 10x is the magnification power—objects appear 10 times closer than to the naked eye. The 42mm is the diameter of the front objective lenses, which controls how much light the binocular can gather. A 10x42 is a popular, well-balanced choice for hunting and general field use across varied terrain and lighting conditions.

What's the difference between BAK-4 and other prism types?

BAK-4 (barium crown glass) is the professional standard for premium binoculars. It delivers better edge-to-edge sharpness and brighter images than lower-grade alternatives like BK-7, especially in the corners of the field of view. If image quality matters, BAK-4 is worth the investment.

Are the KONUSREX binoculars really waterproof?

Yes. They're nitrogen-filled and sealed to keep internal surfaces from fogging or corroding in wet conditions. The rubber armor provides impact and weather protection for field use.

Will these binoculars work for hunting at distance?

The 10x42mm magnification and Silver Mirror Coating optics are well-suited to glassing for game across open and semi-open country. The 10x power gives you good reach without the eye-strain or shakiness that higher magnifications (like 12x or 15x) can introduce when handheld.