BluHorizons 10x42

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World’s First Sunlight Adaptive Binocular

All the action without a glimmer of glare.

The 10x magnification enables high detail recognition and the large 42mm lens diameter ensures a clear view, even in low light conditions.

  • Unique AutoBright™ adaptive lens technology cuts through glare to capture every detail
  • Premium optics give you a sharp, clear picture every time 
  • Compact, light weight and texture-armored to go anywhere
  • Ideal for every active outdoor lifestyle, from seaside to snowfield awarded the Steiner BluHorizons as the "2020 Best Compact Binoculars"

"In very bright conditions, the Autobright™ optics that gives these Steiner BluHorizons binoculars the ability to reduce glare and produce a less washed out, more vibrant image" Full review here.

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Product Features: 

AUTOBRIGHT TECHNOLOGY FOR THE PROTECTION OF YOUR EYES with sunlight-adaptive lens technology dims brightness automatically, to offer the best view in any situation.

FAST-CLOSE-FOCUS central focusing wheel requires minimal, step-less rotation for quick absolute sharpness from close-up to infinity – comfortable, easy to use.

OUTSTANDING RUGGEDNESS with durable polycarbonate Makrolon housing, Water-resistant or Rainproof IPX4 protects the optic against fogging up inside at temperature range between –20°C to +70 °C. Non-slip NBR-Long life rubber armor protection resists oil, acid or adverse weather. Impervious to harsh conditions for generations of trusted use.

ERGONOMIC DESIGN providing comfortable long-term observations. Ergonomic pliable eyecups made of soft, skin-friendly and non-aging silicone protect against incident light and draught. Simply to be folded down for use with eyeglasses.

LIGHTWEIGHT roof prism design has less bulk to fit into your pack and stay out of the way while observing.

EXTENSIVE ACCESSORIES comes with a neoprene bag and carrying strap.


Item No.MagnificationObjective LensField of ViewSpecial FeatureRanging Distance
234510x42mm100 m (@1,000 m)N/AN/A
Field of View100 m (@1,000 m)
Objective Lens42mm
Focus SystemFast-Close-Focus
Optics SystemsAutobright
Close Focus2 m
Exit Pupil4.2 mm
Twilight Factor20.49
Rubber ArmoringNBR Long Life
Weight26.1 oz. (740 g)
Dimension (HxWxL)4.9 x 5.8 x 2.4 in.
Neck StrapYes
Neck Strap AttachmentUniversal
Special FeaturesTemperature Range -4°C to +158°F
Warranty10 Years
Rain Protection CapYes

  Download PDF of Specifications

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Fog proof? Argon or nitrogen filled?

Asked by: Mike27
Nitrogen purged.
Answered by: Steiner Tech Support
Date published: 2021-07-15

I just ordered the bluhorizon 10x42 and realized that I don't see anything about a power source. Do they take batteries and if so what type? Thank you.

Asked by: Mattz
The Blue Horizons do not feature any electronics. The lens coatings are more akin to transition lenses.
Answered by: Steiner Tech Support
Date published: 2021-04-22
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