Steiner 10x50 Military Marine Binoculars - Green Porro Prism High-Performance Optics
The Steiner 10x50 Military Marine binoculars bring combat-proven optical engineering to hunters, spotters, and serious glassers who won't accept compromise. Built on the same toughness standards that earn Steiner respect in military and law enforcement circles, these 10x50 porro prism binoculars deliver the magnification and light-gathering power you need to glass open terrain, hilly country, and low-light conditions—whether you're hunting from a ridge, scanning from a boat, or working a glassing plan across miles of country. The 50mm objective lens and 10-power magnification are purpose-built for distance work where detail matters.
What sets these apart is Steiner's Sports-Auto-Focus system. Set focus once to your eyes, then forget about chasing it. The optics stay razor-sharp from 20 yards to infinity without constant adjustment—a genuine quality-of-life feature when you're glassing for hours or tracking moving game. The fully coated optics and 25 luminosity rating deliver high-contrast images that cut through glare and poor light, while the 327-foot field of view at 1000 yards keeps context and situational awareness in frame.
The engineering underneath is equally serious. A floating prism system with flexible silicone lens mounts absorbs shock and impact that would wreck lesser glass. The Makrolon polycarbonate housing wrapped in NBR Long Life rubber armoring can handle 11 Gs of impact and won't quit—this is gear that lasts generations in hard use. Waterproof construction means rain, spray, or river crossings won't compromise them. At 35.3 ounces, they're substantial enough to gather light but balanced for comfortable handheld observation. The 16mm eye relief and adjustable 56–74mm interpupillary distance work for most shooters and outdoor users, while the ±5 diopter range accommodates different vision corrections.
Comes with objective covers, a rain protection cap, a comfort neck strap, and a carry case—everything you need to get to work without extra purchases.
Key Features
- 10x50 magnification and objective for long-range spotting and low-light performance
- Sports-Auto-Focus system maintains sharp focus from 20 yards to infinity without refocus
- Fully coated optics with high-contrast performance for glare and poor-light conditions
- Floating prism system absorbs shock and impact without optical misalignment
- Waterproof, nitrogen-sealed construction for all-weather reliability
- Makrolon polycarbonate housing with NBR Long Life rubber armoring survives 11 Gs of impact
- 327-foot field of view at 1000 yards keeps target context and surroundings in frame
- Adjustable interpupillary distance (56–74mm) and ±5 diopter eyepiece adjustment for personalized fit
- Includes objective covers, rain cap, comfort neck strap, and carry case
Specifications
| Magnification | 10x |
| Objective Lens Diameter | 50 mm |
| Field of View | 327 ft at 1000 yds |
| Close Focus Distance | 66 ft |
| Exit Pupil | 5 mm |
| Eye Relief | 16 mm |
| Interpupillary Distance Range | 56–74 mm |
| Diopter Adjustment Range | ±5 dpt |
| Luminosity Index | 25 |
| Twilight Factor | 22.4 |
| Focus System | Sports-Auto-Focus |
| Optical Coating | Fully Coated High Contrast |
| Housing Material | Makrolon polycarbonate with NBR Long Life rubber armoring |
| Waterproof | Yes |
| Nitrogen Filled | No |
| Impact Resistance | 11 Gs |
| Weight | 35.3 oz |
| Dimensions (H × W × L) | 5 in × 8.1 in × 12 in |
| Eyecups | Cylindrical |
| Included Accessories | Objective covers, rain protection cap, comfort neck strap, carry case |
Frequently Asked Questions
Are these binoculars waterproof and suitable for hunting in wet conditions?
Yes. The Steiner 10x50 Military Marine binoculars are waterproof and built to handle rain, spray, river crossings, and other harsh field conditions without compromising optical performance or internal mechanism.
Do I need to adjust focus constantly while glassing, or can I set it once?
You set focus once to your individual eyepieces using the diopter adjustment, then the Sports-Auto-Focus system keeps images sharp from 20 yards to infinity. No chasing focus on moving targets or changing distances—a significant advantage in long glassing sessions or hunting situations.
What's included with these binoculars?
The package includes objective lens covers, a rain protection cap, a comfort neck strap, and a padded carry case. You get everything needed to protect and transport them without additional purchases.
How durable are these binoculars if I drop or impact them?
The floating prism system with flexible silicone lens mounts is designed to absorb severe shock without optical misalignment. The Makrolon polycarbonate housing and NBR Long Life rubber armoring can withstand 11 Gs of impact. They're built to survive hard use over generations of field work.

