Enjoy the outdoors with these long-range Porro binoculars by Barska. The sturdy, rugged design with easy-to-maneuver zooming makes this a perfect way to see mid- and far-range objects. The black rubber body and firm grips are designed for easy use....more
The Colorado 10-30x60mm Zoom Binoculars give pristine mid to long-range viewing with smooth focusing capabilities, powerful optics, and a rugged body. Zooming in is easy with a large center focus knob and right eye diopter adjustment.
Body material: Rubber
Dimensions: 3.1 inches high x 6.5 inches wide x 9.4 inches long
Field of view (feet): 189 feet @ 10x, 105 feet @ 30x
Field of view (meters): 63 meters @ 10 x, 35 meters @ 30x
Angle of view (degrees): 3.6-degrees @ 10x, 2-degrees @ 30x
Objective diameter: 60 mm
Close focusing distance (m): 32.8/10
Exit pupil (mm): 6 @ 10x, 2 @ 30x
Relative brightness: 36 @ 10x, 16 @ 30x
Eye Relief (mm): 14 @ 10x, 12 @ 30x
Lens coating: Fully coated
Lens color: Blue
Prism type: Porro
Prism coating: BAK-7
Focusing system: Center
Eyecups: Rubber fold down
Warranty: Limited lifetime
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Thank you for your inquiry. Roof prism, Porro prism, and reverse Porro prism binoculars each use image-erecting prisms to provide correctly oriented images. Without prisms, the image would always appear upside down and reversed. Most of us recognize the Porro prism as a “classic” binocular design with offset prisms while the roof prism binocular is shaped like an H: more streamlined and compact. The size, type, and quality of the prisms used in a binocular’s design affect the clarity of the image. You may prefer one style over another based on its ergonomics. Since roof prism binoculars are more expensive to manufacture, economics will also be a factor in choosing which style is best for you.
Porro Prism Binoculars:
Porro prism models will deliver good optics for the dollar, but lack the durability and compact styling of roof prism models. In addition, many Porros are not waterproof.
Reverse Porro Prism Binoculars:
This design allows for a compact binocular that easily fits in your hand.
Roof Prism Binoculars:
In recent years, the popularity of the roof prism design has increased dramatically. These binoculars are rugged and durable, and you no longer have to spend more money to get good optical quality in this design.
overstockcustomercare1 on Feb 19, 2013
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