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
(mm)
(inch) |
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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