Celestron Trailseeker 8x42 ED Binoculars

The Celestron Trailseeker 8x42 ED (product ID 47032156487987) is an 8x magnification binocular with a 42mm objective lens. That pairing gives you a wide 142m field of view at 1000m and a bright 5.25mm exit pupil solid performance for birdwatching, wildlife and general outdoor use. Close focus sits at just 6.5 feet which is excellent for butterflies, plants and nearby birds.

The optics are built around Extra-Low Dispersion ED glass that virtually eliminates chromatic aberration the colour fringing you often see around high-contrast edges. All air-to-glass surfaces carry multiple layers of anti-reflectivity coatings making these fully multi-coated. The BaK-4 prisms carry both phase and dielectric coatings to maximise light reflection through the eyepiece. The result is edge-to-edge sharpness with accurate colour and bright images even in low light.

The body is magnesium alloy wrapped in rubber armour and weighs just 666g. It is fully waterproof and nitrogen-filled to prevent internal fogging. Twist-up eyecups with multiple click stops make it comfortable for both glasses wearers and non-glasses wearers. Eye relief is 17.2mm.

Tripod adaptable for digiscoping or extended viewing sessions. Comes with neck strap, carrying harness and protective soft case. Celestron positions this as comparable to binoculars costing two to five times more.

The 8x42 format gives a 5.25mm exit pupil bright enough for dawn and dusk use. ED glass reduces chromatic aberration by controlling how different wavelengths of light bend through the glass. BaK-4 prisms with phase coatings correct the phase shift that roof prisms introduce, restoring contrast and resolution. Dielectric coatings on the prism faces reflect over 99% of light rather than losing it. Fully multi-coated outer lenses cut surface reflections on every air-to-glass surface. Together these push light transmission to its practical maximum.

The chassis is magnesium alloy light and stiff. The outer body is wrapped in rubber armour for grip and impact resistance. The objective lenses use ED glass to control dispersion. BaK-4 glass prisms carry phase and dielectric coatings. The barrel is sealed and nitrogen-filled.

Clean lenses with a soft brush then a microfibre cloth. Never use household cloths. Store in the included soft case when not in use. Keep the body dry and check the eyecups and hinge regularly for wear. Warranty cover depends on normal use avoid impacts and do not attempt to disassemble the optical body.