ALPEN OPTICS Chisos 8×25 ED – Binoculars with PXA Coating | BaK-4

ALPEN OPTICS · Binoculars · ED

ALPEN OPTICS Chisos 8×25 ED – Compact Binoculars | Roof Prism | BaK-4 | IPX7

8×25 magnification · ED glass · BaK-4 roof prism · PXA phase coating · UBX fully multi-coated · 110 m field of view at 1’000 m · 3.1 mm exit pupil · IPX7 waterproof · nitrogen purged · 268 g · polycarbonate housing · twist-up eye cups.

Pocket-sized precision – ED optics that fit in your hand

The ALPEN OPTICS Chisos 8×25 ED packs premium optical performance into a body you can slip into a jacket pocket. Extra-low dispersion (ED) glass elements virtually eliminate chromatic aberration, delivering sharp, colour-true images from edge to edge. BaK-4 roof prisms with PXA phase correction coating and UBX fully multi-coated optics push light transmission up to 95 %, producing bright, high-contrast views even in fading light. At just 268 g and measuring 106 × 101 × 47 mm, the Chisos 8×25 is the ideal companion for hikers, birders and travellers who refuse to compromise on image quality.

BaK-4 roof prisms with PXA phase coating – contrast you can see

Roof-prism binoculars are inherently more compact than Porro designs, but they can suffer from phase-shift artefacts that reduce contrast. The Chisos 8×25 solves this with a PXA phase correction coating applied directly to the BaK-4 prism surfaces, restoring full contrast and resolution. Combined with UBX fully multi-coated lens elements, the result is a bright, sharp image with faithful colour reproduction – exactly what you need when identifying birds in dense foliage or scanning a hillside at dusk.

IPX7 waterproof & nitrogen purged – built for the elements

The Chisos 8×25 is sealed to IPX7 standards, meaning it survives immersion in up to 1 m of water for 30 minutes. Internal nitrogen purging prevents fogging when moving between temperature extremes. The polycarbonate housing with rubber armouring absorbs shocks and provides a secure grip even in wet conditions. With an operating range of −10 °C to +50 °C, these binoculars are ready for anything from alpine snow to tropical humidity.

Key features – ALPEN OPTICS Chisos 8×25 ED

• 🔍 8×25 compact roof-prism binoculars – fits in a jacket pocket
• 💎 ED glass elements – virtually eliminates chromatic aberration
• ✨ PXA phase correction coating on BaK-4 prisms – enhanced contrast & resolution
• 🔦 UBX fully multi-coated optics – up to 95 % light transmission
• 🌍 110 m field of view at 1’000 m (8°) – wide panoramic view
• 💧 IPX7 waterproof + nitrogen purged – fog-free in all conditions
• ⚖️ Only 268 g – ultra-lightweight for all-day carry
• 👓 Twist-up eye cups – comfortable with or without glasses
• 🎯 5 m close focus – ideal for butterflies & flowers
• 🧳 Nylon carry case with shoulder strap included

Who is the ALPEN OPTICS Chisos 8×25 ED for?

The Chisos 8×25 ED is designed for outdoor enthusiasts who value portability without sacrificing optical quality: hunters glassing terrain from a ridgeline, birders who want a pocket binocular for spontaneous sightings, hikers keeping pack weight low, sports fans wanting a sharp view from the stands, and travellers who need a compact optic for sightseeing and wildlife encounters.