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Item#: N82E16884184006

PENTAX 8.5 x 21 Papilio Binoculars

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  • Magnification: 8.5X
  • Eyepiece Ring: Helicoid type
  • Real Field of View: 6.0°

Choking Hazard: Small parts. Not for children under 3 years.

  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Need a pair of binoculars that are light enough to take anywhere, yet versatile enough to deliver reliable performance whether you're in wet or dry conditions?

The Pentax 8.5 x 21 Papilio Binoculars might just be the one for you. A powerful 8.5X magnification brings objects 8.5 times closer than your naked eyes can see. The large 21mm objective lenses gather more light, making a brighter image. At a mere 10.2 ounces, these versatile binoculars are suitable for backpacking, birding, sports events, stargazing, and pretty much any activity you might reasonably want binoculars for.

Only you can decide if these are for you.

  • newegg Excellent Close-up Capability The Pextax 8.5 x 21 Papilio Porro Prism Binocular features the 8.5X magnification capability for extreme close-up viewing of insects, birds, artwork or any other object at close ranges.
  • newegg Fully Multi-Coated Lens with PentaBright Technology The Pextax 8.5 x 21 Papilio Porro Prism Binocular features high-quality optics with multi-coating and UV ray protection to minimize glares and reflections and protect your eyes from harmful UV rays.
  • newegg High-index BaK-4 Prisms The Pextax 8.5 x 21 Papilio Porro Prism Binocular uses high-index BaK-4 prisms for ultra bright, crisp images from edge to edge.
  • newegg CLOSE Mechanism With the Pentax’s Convergent Lens Optical System Engineering (CLOSE) mechanism, this binocular automatically slides the left and right objective lenses toward the center when the focus is fixed at a short distance, so the binocular is perfect for close-range viewing.

Learn more about the PENTAX 8.5 x 21 Papilio


8.5 x 21 Papilio


Binocular Type: Center focusing, porro-prism

Lens Construction: Objective Lens: 2 elements in 1 group Eyepiece Lens: 5 elements in 5 groups

Magnification: 8.5X

Objective Lens Diameter: 21mm

Real Field of View: 6.0 degrees

Apparent Field of View: 51 degrees

Field Of View At 1000 Meters: 105m

Field of View at 1000 Yards: 315 ft.

Exit Pupil: 2.5mm

Eye Relief: 15mm

Prism: Porro

Relative Brightness: 6.3

Diopter Adjustment Range: +/- 4m -1

Diopter Adjustment: Click-stop adjuster built in right eyepiece

Eye Distance Adjustment Range: 56mm-74mm (2.2" - 2.9")

Focusing Range: Approx. 0.5m (1.6 ft.) to infinity

Eyepiece Ring: Helicoid type

Body Color: Black & dark gray

Height Width: 116mm x 110mm (4.6" x 4.3")

Thickness: 55mm (2.2")

Weight: 290g (10.2 oz.)


No other binoculars like them on the market

C.L.O.S.E. (Convergent Lens Optical System Engineering) allows minimum focusing distance of 1.6 feet.

Ideally suited for viewing birds, insects, flowers, artwork / printed materials or any other object at close range

Revolutionary dual-axis, single body housing with synchronized eyepiece adjustment to assure correct optical alignment for comfortable viewing

High-quality BaK4 prisms for maximum illumination in low light

Fully multi-coated optics reduce glare and harmful UV rays while providing maximum light transmission and color quality

Fast and easy center focus design for handling ease

Tough rubber housing improves grip and shock resistance

Helicoid eyepiece rings for extra viewing comfort
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by's Standard Return Policy.
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