Ricoh Pentax 8.5×21 Papilio Binoculars

Named for the Latin word for butterfly, PENTAX Papilio 8.5×21 binoculars are the perfect choice for insect observation in the field and in museums and galleries. The enhanced observation capability of the Papilio binoculars is made possible by a PENTAX Convergent Lens Optical System Engineering (CLOSE) mechanism. The CLOSE mechanism automatically slides the left and right objective lenses toward the center when the focus is fixed at a short distance.

Specifications

• 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: 50 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
• Minimum Focusing Distance: 1.6 ft.
• Relative Brightness: 6.3
• Diopter Adjustment Range: +/- 4 m -1
• Diopter Adjustment: Right diopter ring (click diopter adjustment)
• Eye Width Adjustment Range: 2.2 – 2.9\\”
• Focusing Range: 1.6 ft. – infinity
• Eyepiece Ring: Helicoid Type
• Body Color: Black & dark gray
• Dimensions: 4.5 x 4.3 x 2.2\\”
• Weight: 10.2 oz.
• Accessories: Eyepiece lens caps, Case, Neck strap
• Vergence Correction: Focus-coupled correction mechanism