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Delta Optical Extreme 7x50 ED

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Delta Optical Extreme 7x50 ED Details

The Extreme model made by Delta Optical with 7x50 configuration is a highly durable and very bright binocular. If you are looking for binoculars for marine applications, this is the right place for you! 7x magnification gives you still enough detail and eliminates sea sickness that occurs on boats, and 50 mm objective lens helps you with perfect brightness even during twilight hours. These binoculars have a Porro prism design and multi-layers of high-quality FCM coating that also gives you incredible resolution free of major distortions such as chromatic aberration. They have a wider field of view that helps you to easily track and stay on the target. The Extreme 7x50 is of course extremely durable with tight seals and individual focusing mechanism instead of central, that helps to make them waterproof. They are also purged with nitrogen gas so internal glass fogging will never be a problem due to temperature fluctuations. Enclosed in rugged rubber armoring, these binoculars won’t yield due to sudden impacts and will provide you with safe firm grip that won’t accidentally slip out of your hands. They work from -40 to 70 °C. Eyepieces are comfortable when pressed to the face and cut the light from the sides.


Short Description of Delta Optical Extreme binoculars

The Delta Optical Extreme series offers the biggest and one of the most powerful binoculars with Porro prism system on the market. Large variety of binoculars in this series are suitable for marine use, hunting, military, navy, law enforcement and astronomy applications. Even though these binoculars use Porro prism system, they are upgraded with modern optical innovations. The construction is wrapped in rubber armor to protect them against different impacts and rugged surface provides you with a non-slip grip although it’s recommended mounting them to a tripod, since they are much heavier. Optically the Extreme series offers incredibly high light transmission rate with the help of FCM multi-coated system on ED glass surfaces with razor sharp images free of major distortions from edge to edge. These binoculars are also waterproof and fog-proof due to nitrogen gas purging and tight seals and will not get damaged even when used during harsh weather conditions and can operate in temperature range from -40 to 70 °C. To make proper focus adjustments, the Extreme series is equipped with individual focusing mechanism, that also helps to make them more impervious. Eyepieces have only one position but longer exit pupil distance helps to give a proper eye-relief even for eye glass wearers.


Features of Delta Optical Extreme Binoculars

  • Multi-coated (FMC coating)
  • ED Glass
  • Aluminum Body
  • Porro Prism Binoculars
  • Phase Correction
  • Prism Coatings
  • Bak4 Prisms
  • Rugged Rubber Armoring
  • One-Position Eyecups
  • Individual Focusing
  • Waterproof and fog-proof (Nitrogen filling)
  • Tripod Adaptable
  • Wider FOV


Accessories of Delta Optical Extreme Binoculars

  • Neck Strap
  • Protective Case
  • Objective Lens Covers
  • Rainguards
  • Tripod adapter
  • Lens Cleaning Cloth
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Delta Optical Extreme 7x50 ED Specifications

ManufacturerDelta Optical
Binoculars seriesDelta Optical Extreme
Made inChina
In production since
Warranty5 years
Prism type Porro
Variable magnification No
Magnification. 7x
Diopter range
Lens diameter. 50mm
Exit pupil. 7.1mm
Field of view... 131m/1000m
Field of view (deg.). 7.51°
Apparent field of view (deg.).
Eye relief. 23mm
Close focus. 0m
Twilight Factor18.71
Light transmission
Relative Brightness 50.4
Lens coating Fully Multicoated
Working temperature range
Filled with Nitrogen
Focusing system Separated for each eye
Diopter setting positionNo
Min. interpupillary.0
Max. interpupillary.0
Body typeSingle hinge
Waterproof Yes
Fogproof Yes
Tripod adaptableNo
Compass No
Built-in rangefinderNo
Image stabilizer No
Floatable No

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