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Silva Epic 10X Binocular

$209.99 CAD SI-37649

The Silva Epic 10 combines powerful 10 x magnification with a compact, waterproof, foldable design; making these pair of binoculars perfect for any kind of outdoor activity that occasionally requires extra Sharp Eyes.

The high-quality Bak-4 optics ensure excellent, clear images, and the dual-hinge system makes the binoculars easy to fold and compact to carry when not in use. Fully waterproof, Epic 10 are just as suitable for kayaking, boating and fishing as for hiking, camping, climbing and mountaineering.

The durability features also include a grip-friendly rubberized coating and the nitrogen gas filling that makes the binoculars condensation proof. A wide neoprene neck strap, a carrying case and a cleaning cloth are included.

  • GREAT OPTICAL PERFORMANCE: Bak-4 optics high quality glass
  • WATERPROOF: Withstands tough weather conditions
  • NO FOG / CONDENSATION INSIDE: Nitrogen gas filled.
  • MAGNIFICATION: 10 Power for Long distance viewing
  • LIGHTWEIGHT: No need to carry unnecessary weight
  • FIELD OF VIEW: Easy to identify quick moving objects, wide field of View 331ft. [101m]
  • NECK STRAP: For keeping your binoculars close at hand while out in the wilds.
  • Size: One Size
  • Field of View: 375 feet [101m]
  • Magnification: 10X Power
  • Objective Lens Diameter: 25mm lens
  • Size: 4.13" x 4.49" x 1.77" [105 x 114 x 45mm]
  • Weight: 10.23oz [290g]
  • Prism Type: BK-4
  • Water Resistance: IPX7 - Waterproof
  • Nitrogen gas Filled: Yes - No Fog/Condensation
  • Usages: Backpacking, kayaking, boating and fishing as for hiking, camping, climbing and mountaineering.

BAK-4 is a high density glass of better optical quality than BK-7. With BAK-4, if you hold binoculars away from your eyes and up to the light you can see the circular exit pupils in the eyepieces. The less expensive BK-7 prisms have squared-off, non-circular exit pupils.
The prism is alike: Bak4 prism costs more than Bk7 prism - Bk7 prism is fine to most of the users, but, to some "picky" users, Bak4 prism is a must. The difference is the quality of glass and anti-reflective coatings.

The design of the prisms can affect the quality of the exit pupil. The BK7 prism typically found in lower priced binoculars produces an exit pupil with shaded (blurred) edges, whereas the BAK4 prism has a perfectly round exit pupil. Whilst the BK7 prism design would look no different to the BAK4 in daylight, as the light levels drop, and the eye pupil expands you start to observe the effects of the shaded regions as the image quality drops and becomes prone to chromatic aberration around the periphery of the image.
See the illustrations bellow

bak-4 and bak-7 prisms


Exit pupil binoculars
puip diameter during day and night