Pentax Papilio II 6.5 x 21 Binoculars


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SKU: 27075087392


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Suddenly so close you can almost touch it. That’s because Pentax quality and clarity are within reach, at a price that’s within reach too. These compact porro-prism models feature a dual-axis, single body design with synchronized eyepiece adjustment. Aspherical lens elements give you edge-to-edge sharpness over a surprisingly wide field of view. Pentax’s waterproof Papilio binoculars are particularly popular due to their close focusing distance of only 50cm, making them perfect for observing butterflies or other insects at much closer range than almost all other binoculars on the market.

6.5X21 Papilio
Type (Mechanism) Centre-focusing porro prism
Lens construction
(Objective Lens)
(Eyepiece lens)
2e – 1g
5e – 5g
Magnification 6.5x
Objective lens diameter 21mm
Real field of view 7.5º
Apparent field of view 49º
Field of view at 1000m 131m
Field of view at 1000 yards 393ft
Exit pupil 3.2mm
Eye relief 15mm
Relative brightness 10.2
Diopter adjuster Click-stop adjuster built in right eyepiece
Diopter Adjustment range ±4m-1
Eye width adjustment range 56 to 74mm
2.2 to 2.9 inch
Focusing range Approximately 0.5m to infinity
Approximately 1.6 ft to infinity
Vergence Correction Focus-coupled correction mechanism
Eyepiece ring Helicoid type
Body colour Black & Dark grey
Height & Width
114 x 110mm
4.5 x 4.3 inches
Thickness 55mm (2.2 inch)
Weight 290 g (10.2 oz)
  • Effortless Close-Range Observation
    The Papilio series features the PENTAX-developed Convergent Lens Optical System Engineering mechanism, which automatically slides the left and right objective lenses toward the center when the focus is fixed at a short distance. As a result, the right and left image fields are correctly aligned to facilitate close-range viewing. Thanks to its go-anywhere portability, this new series is also ideal for conventional binocular subjects, including spectator sports, travel and hiking.


  • Extra-Short Minimum Focusing Distance
    The Papilio series offers a minimum focusing distance of just 50 centimeters (approx. 1.6 feet), considerably shorter than the two-meter distance (approx. 6.5 feet) offered by similar PENTAX models currently on the market.


  • Outstanding Optical Performance
    The Papilio series features multi-coated optical elements to minimize unwanted light reflections for a well-defined subject image. The combination of aspherical optical elements and high-refraction BaK4 glass prisms assures a sharp, clear image with minimal distortion, even at the edges.


  • Long Eye Relief
    The Papilio series offers a long 15-millimeter eye relief to assure effortless viewing of the entire image field, even for eyeglass wearers.


  • Protective Rubber Housing
    The protective rubber housing not only protects inner mechanism from external shock, but also assures a firm, comfortable grip of the binocular body even in the field.


PENTAX-original dual-axis eye-distance adjustment mechanism for quick, effortless eye-distance control

Extendable helicoid-type eyepiece rings with a single-action pop-up/storage mechanism

Diopter adjuster with a click-stop lock mechanism to avoid accidental diopter shift

Neck strap with a quick installation/removal mechanism

Tripod receptacle for stable observation


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