Pentax Papilio II Series Binoculars 8.5 x 21mm. This series of Papilio binoculars has been designed to be used for different purposes. Very versatile and compact, you can use them in museums, art galleries, botanical observations including macro with insects, concerts, sports observation and stargazing. Magnification: 8.5x. Effective aperture of the lens: 21mm. Angle of view: 6.0 degrees. Field of view (at 1000m): 105m. Exit pupil: 2,5mm. Ocular clearance: 15mm. Relative brightness: 6.3. Minimum focusing distance: 0,5m. Height (approx.) 116mm. Width (approx.): 110mm. Thickness (approx.): 55mm. Weight (approx.): 290 gr.