ALPEN OPTICS Chisos 8×42 ED – Binoculars with PXA Coating | BaK-4

ALPEN OPTICS · Binoculars · ED

ALPEN OPTICS Chisos 8×42 ED – Full-Size Binoculars | Roof Prism | BaK-4 | Magnesium | IPX7

8×42 magnification · ED glass · BaK-4 roof prism · PXA phase coating · FMC optics · 123 m field of view at 1’000 m · 4.96 mm exit pupil · 2 m close focus · IPX7 waterproof · nitrogen purged · 620 g · magnesium housing · tripod mountable · violet coating.

The bright all-rounder – 8×42 ED with wide field and magnesium body

The ALPEN OPTICS Chisos 8×42 ED is a full-size binocular designed for bright, steady viewing across a wide 123 m field of view at 1’000 m. The comfortable 8× magnification minimises hand shake, while the large 42 mm objectives and 4.96 mm exit pupil deliver exceptionally bright images – even in twilight and overcast conditions. Extra-low dispersion (ED) glass elements virtually eliminate chromatic aberration, and BaK-4 roof prisms with PXA phase correction coating and violet-hued FMC optics push contrast and transmission to premium levels. The robust magnesium housing keeps weight at 620 g while providing superior rigidity. A 2 m close focus distance and tripod mount thread make the Chisos 8×42 equally at home studying butterflies at close range or scanning a distant tree line. Sealed to IPX7 and purged with nitrogen, it handles rain, fog and temperature swings from −10 °C to +50 °C.

4.96 mm exit pupil – bright images from dawn to dusk

The 8×42 configuration produces a large 4.96 mm exit pupil – nearly matching the human eye’s dark-adapted pupil diameter. This means the Chisos 8×42 delivers noticeably brighter images at dawn, dusk and under heavy cloud cover compared to 10×42 binoculars with their smaller 4.2 mm exit pupil. The brightness index of 27.6 and twilight factor of 20.5 confirm exceptional low-light capability. For hunters who need to identify game in the last minutes of legal shooting light, and for birders who start before sunrise, the 8×42 configuration is the premium choice.

Magnesium housing & 2 m close focus – versatile strength

The magnesium alloy chassis is approximately 33 % lighter than aluminium yet far more rigid than polycarbonate, providing excellent impact resistance and thermal stability. At 620 g, the Chisos 8×42 is remarkably light for a full-size metal-body binocular. A 2 m close focus distance opens up macro-level nature observation, while the integrated tripod adapter thread enables extended, rock-steady sessions for digiscoping or wildlife studies. The 123 m field of view at 1’000 m (7°) provides a wide, immersive panorama – ideal for tracking birds in flight or scanning open landscapes.

Key features – ALPEN OPTICS Chisos 8×42 ED

• 🔍 8×42 full-size roof-prism binoculars – steady handheld views with generous light gathering
• 💎 ED glass elements – virtually eliminates chromatic aberration
• ✨ PXA phase correction coating on BaK-4 prisms – enhanced contrast & resolution
• 🔦 Fully multi-coated (FMC) optics with violet hue – bright, high-contrast images
• 🌍 123 m field of view at 1’000 m (7°) – wide panoramic coverage
• 💧 IPX7 waterproof + nitrogen purged – fog-free in all conditions
• 🧲 Magnesium housing with rubber armouring – 620 g light yet rugged
• 🌟 4.96 mm exit pupil (brightness 27.6) – bright views even at twilight
• 🎯 2 m close focus – macro-level nature observation
• 🧳 900D sailcloth case with storage pocket & lens caps included

Who is the ALPEN OPTICS Chisos 8×42 ED for?

The Chisos 8×42 ED is designed for outdoor users who prioritise brightness and a wide field over maximum magnification: hunters who need to identify game at dawn and dusk, birders who value a steady, shake-free image for all-day observation, nature enthusiasts who want bright, panoramic views of landscapes and wildlife, hikers who appreciate a magnesium body for weight savings, sports fans wanting bright optics from any seat, and travellers seeking a premium all-rounder for sightseeing and wildlife encounters.