Pentax 8.5×21 Papilio Binocular Review
The 50 year story of Pentax since its existence in 1957 as Pentax Corporation is a story of success and quality. All through the years the efforts made by the company to understand the requirement of its customers and by the way of developing its products bring out its extreme uniqueness. In its brand also includes many optical products like spectacle lenses, cameras, medical equipment, CCTV etc. Pentax 8.5×21 Papilio Binocular is handy product of Pentax with C.L.O.S.E feature.
Pentax 8.5×21 Papilio Porro Prism Binocular comes to existence under the Papilio series of the company suits best for viewing close objects. All new experience can go with this handy binocular to watch insects, birds and other minute objects closely.
Pentax 8.5×21 Close Focus Papilio Binocular is entrenched with the C.L.O.S.E feature which is Convergent lens optical system engineering. This binocular allows focusing as close as 1.6 feet.
Well structured to protect the interiors with single body housing and rubber armoring. This gives a promising grip and handle without any drops. This unibody construction makes it easy to handle with compactness.
The optic is fully multi coated which acts effectively to protect from the UV rays and enhances the clarity of the image. Also been provided with the helicoids eyepiece rings it comforts the viewing experience. The found is the BaK4 prism which makes it feature good for the dim light viewing. It consists of the diopter adjustment which ranges from ±4m-1 operate with click stop adjuster.
This Pentax Binocular was dimensioned as a depth of 55mm, width of 110mm and height of 116mm. Pentax 8.5 x 21 Papilio Binocular weighs 290 grams. The various accessories accompanied with Pentax 8.5×21 Papilio Binocular are eyepiece lens cap, case and a neck strap.

Pentax 8.5×21 Papilio Binocular - Technical Specification Table
| Make | Pentax |
| Model Name | 8.5×21 Papilio |
| Prism Type | Porro Prism Binocular |
| Magnification | 8.5 x |
| Diameter of Objective Lens | 21 mm |
| Relative brightness | 6.3 |
| Exit pupil | 2.5 mm |
| Eye piece | 25 mm |
| Field of view at 1000 (meters or yards) | 105 m |
| Width | 110 mm |
| Height | 116 mm |
| >Weight | 290 g |
| Applications | General Purpose |
| Box Contents | Binocular, eyepiece lens cap, case and neck strap |









January 31st, 2009 at 12:45 pm
This childhood hobby to use binocular and still I enjoy. I bought this binocular as it has precise focusing. I am happy to see birds at closer focus when we have clear vision. The promising high quality and updated technology with this binocular, I find it bird watching very interesting.