12x magnification pulls distant subjects significantly closer than 8x or 10x — but that extra power amplifies every optical flaw. The Alpen Chisos 12x50 uses ED glass and PXA phase-coated prisms to keep images sharp and color-accurate at 12x, while 50mm objectives gather enough light to stay usable into twilight where lower-power binoculars would have the brightness advantage.

Key Features

• 12x Magnification — Significantly more reach than 8x or 10x for long-range observation, detailed plumage ID at distance, and tighter views on distant terrain features.
• 50mm Objective Lenses — Larger than 42mm for brighter images in marginal light, partially offsetting the brightness penalty that comes with higher magnification.
• ED Glass — Extra-low dispersion elements eliminate the chromatic aberration that 12x power would otherwise amplify, keeping colors true and edges sharp.
• PXA Phase-Coated BaK-4 Roof Prisms — Phase correction preserves resolution and contrast edge-to-edge for confident detail work at distance.
• Fully Multi-Coated Optics — Every air-to-glass surface treated for maximum light transmission and minimal glare.
• 6.5-Foot Close Focus — Versatile enough for nearby subjects despite the long-range emphasis.
• Lightweight Magnesium Housing — Durable yet manageable for extended sessions with textured grip panels.
• Waterproof & Nitrogen-Filled — Sealed against rain and humidity, internally fog-proof through rapid temperature swings.

Ideal For

• Long-range birders who want to ID shorebirds across mudflats, raptors on distant perches, or waterfowl at the far end of a lake where 8x and 10x fall short.
• Hunters who glass wide-open western terrain — ridgelines, basins, and clearings — where the extra reach of 12x reveals game that lower magnifications miss.
• Wildlife observers who work from fixed positions and want maximum detail on distant subjects.
• Astronomy enthusiasts who want tighter views on the moon, Jupiter's moons, and bright star clusters than 8x or 10x can deliver.
• Experienced users comfortable managing the narrower field of view and steadier hand that 12x demands — this is a step up in reach, not a beginner's binocular.