Named for the Latin word for butterfly, PENTAX Papilio 6.5x21 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.
Binocular Type: Center focusing, porro-prism Lens Construction: Objective Lens: 2 elements in 1 group Eyepiece Lens: 5 elements in 5 groups Magnification: 6.5X Objective Lens Diameter: 21mm Real Field Of View: 7.5 degrees Apparent Field Of View: 49 degrees Field Of View At 1000 Meters: 131m Field Of View At 1000 Yards: 393 ft. Exit Pupil: 3.2mm Eye Relief: 15mm Prism: Porro Relative Brightness: 10.2 Diopter Adjustment Range: +/- 4 m -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: 114mm x 110mm (4.5" - 4.3") Thickness: 55mm (2.2") Weight: 290g (10.2 oz.) Vergence Correction: Focus-coupled correction mechanism