Terra 10×42 ED Roof Prism Grey

AT A GLANCE

• SCHOTT Extra Low-Dispersion Glass
• Schmidt-Pechan Roof Prism Design
• Zeiss Hydrophobic Multi-Coated Optics
• Wide 60° Viewing Angle
• Nitrogen-Filled, Fogproof and Waterproof
• 5.25 ft Close Focus Distance
• Closed Bridge Configuration
• Reinforced Polycarbonate Housing
• Large Centre Focusing Wheel
• Twist-Up Rubber Eyecups

DESCRIPTION

The grey 2017 edition of Zeiss Optics’ 10×42 Terra ED Binocular features a redesigned ergonomic chassis that makes holding them more comfortable, especially during long glassing sessions. Optically, they retain the exceptional elements that are the hallmarks of the Terra ED including compact Schmidt-Pechan roof prisms, SCHOTT extra low-dispersion (ED) glass, and the proprietary multi-coatings. These complementary technologies and elements work together to produce an immersive observational experience that presents clear and bright views, with accurate colour representation and virtually zero distortion, across the entire wide field of view. The 60° apparent angle of view also helps to minimise the visible hand-shake common in higher-power binoculars.

The comfortable ergonomic chassis is made of a fibreglass reinforced polycarbonate to help reduce weight, without sacrificing strength while adding impact and temperature resistance. Being resistant to temperature changes not only ensures that the housing will remain a constant temperature, even in cold and wet conditions, but will not experience the expansion and contraction common in metal chassis that can cause the optical elements to move out of alignment over time and preventing the binocular’s ability to achieve sharp focus. The chassis is covered in a bgrey rubber armouring that helps to protect it from drops and impacts, and provides a slip-resistant grip.

Optical Performance

• 10x magnification
• 42mm objective lenses
• Roof prism optical path
• The compact Schmidt-Pechan prism design corrects the view while allowing for thinner optical tubes versus the more common Abbe-Koenig design
• SCHOTT ED glass elements reduces chromatic and spherical aberrations to produce views with true colour rendition without halos, diffraction, or distortion across the entire field of view
• Zeiss proprietary hydrophobic multi-coated optics sheds dust, dirt, and oils while improving light transmission, colour rendition, sharpness, and contrast
• Short 5.25 foot close focus distance
• Wide 60° apparent angle of view
• 330′ field of view at 1000 yards
• Long 15mm eye relief
• Comfortable 4.2mm exit pupil

Use and Handling

• Closed-bridge configuration
• Large fast-focus center wheel
• ±3 right-eye dioptric correction
• 58-75.5mm interpupillary adjustment range
• Twist-up click-stop rubber eyecups for comfortable use with or without eyewear

Construction Details

• Impact, corrosion and temperature-resistant fiberglass-reinforce polycarbonate housing
• Temperature resistance prevents expansion and contraction in extreme temperature changes which prevents optical components from moving out of alignment
• Protective grey rubber armour
• Nitrogen-filled for water and fogproof performance
• Submersible to 100 mbar of pressure, or approximately 3′ (1m)
• Operating Temperature 5 to 140°F (-15 to 60°C)
• Weight: 24.5 oz

SPECIFICATIONS

Prism Type Roof
Magnification 10x
Objective Lens Diameter 42mm
Angle of View 6.0° (actual) 60.0° (apparent)
Field-of-View 330.0′ @ 1000 yd / 109.6 m @ 1000 m
Minimum Focus Distance 5.25′ / 1.60 m
Exit Pupil Diameter 4.2mm
Eye Relief 15 mm
Interpupillary Adjustment 58.0 – 75.5 mm / 2.3 – 3.0″
Dioptric Correction +3 / -3
Focus Type Centre
Tripod Mount None
Dimensions 5.5 x 4.7″ / 13.97 x 11.94 cm
Weight 24.5 oz / 695 g