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Notes From the Field; Riton’s New 5 Primal 10×40 ED Binoculars

If you’re a big game hunter who spends countless hours in the field searching for your quarry you no doubt have come to realize the value of quality optics. This could never be truer than when hunting the American Pronghorn.

Vast open prairie and desert terrain combined with a critter that often blends in perfectly to its environment, runs like the wind, and that can see better than most spy satellites, all adds up to an absolute need for good optics.

Recently I put a new optic to the test while guiding pronghorn hunters in the southern New Mexico desert. Enter Riton Optics latest addition to their hunting-based line of optics, the 5 Primal 10×42 ED Binoculars.

The 5 PRIMAL 10×42 binoculars are built with Riton’s premium ED (extra low dispersion) glass to provide outstanding glassing ability when searching for any game species. Additionally, they provide fully multi-coated, low light enhancement, waterproof and full wide band lens coatings, further enhancing resolution and color accuracy. All of this equals a lifetime of protection against the elements and improved low-light performance.


While guiding on our New Mexico hunt in August of this year, crystal clear viewing of pronghorn at all distances became a reality with the adjustable eyepieces, center focus wheel and the diopter on the 5 PRIMAL 10×42 ED binoculars. When you combine the lightweight, compact, and ergonomic aluminum-alloy body along with rubberized coating the 5 PRIMAL 10×42 ED binoculars were a pleasure to use during many long hours of glassing in search of pronghorn.

Providing an exceptional wide field of view, 348 ft at 1,000 yards, the 5 PRIMAL 10×42 ED binoculars also optimize light transmission.

In a nutshell, these binoculars are designed for the most demanding needs of serious hunters and outdoorsmen.

Product Features and Facts:

  • Magnification: 10x
  • Objective Lens Diameter: 42mm
  • Close Focus: 9.84 ft/300cm
  • Field of View at 1,000 yds: 348 ft
  • Length: 5.7 in/145mm
  • Width: 5.12 in/130mm
  • Weight: 1.67 lb/760g
  • Material: Aluminum Alloy
  • IPX7 Waterproof Rating
  • ED (Extra Low Dispersion) Glass
  • Lens Coating: Fully multi-coated, full wide band, waterproof coated, low light enhancement
  • Prism System: BaK4
  • Light Transmission: >90%
  • MSRP: $649.99

During this most recent pronghorn hunt we found a solid tactic was to be positioned on any elevated hilltop when available and then begin glassing in the early morning with the sun at our back. Once the sun began climbing all pronghorn to the west of your position will literally shine with the morning sun reflecting back off of them.

As you might imagine a quality binoculars became critical especially when trying to determine horn length. Glassing thoroughly when grass is high in some of these prairie regions, I would often find a good pronghorn buck bedded by spotting those black horns sticking up above the grass line and not even see the whole animal. The 5 Primal binoculars provided outstanding performance in these circumstances.

Overall, I found the 5 Primal Binoculars to perform wonderfully and were a breeze to carry when out on foot during long stalks.

All magnified optics from Riton including the 5 PRIMAL 10×42 ED Binocular are backed by a Limited Lifetime Warranty and Promise. Check them out at riton.com  or to find a dealer near you visit www.lipseys.com/dealerfinder


TERRY NELSON – is a 30-year veteran of law enforcement with police and sheriff agencies, including SWAT and sniper roles, and has served as a state game warden. Nelson also served seven years with New Mexico State Guard. A lifelong hunter, guide, tracker and firearms enthusiast, Terry is sought for training in multiple disciplines by both civilian and police-serving agencies and companies. Nelson also holds a Basic Tac Med instructor certification from Federal Law Enforcement Training Center.