Tasco Essential Series Compact Binoculars 8x21

Binoculars always come in handy and these ultra-light binoculars offer outstanding compact performance with a rugged, rubber armour that not only absorbs shock and protects them from bumps and bruises, it adds in a weather resistance factor should it decide to rain - or snow. Perfect for tramping, backpacking or bicycle touring.

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• Rubber fold-down eyecups
• Black rubber armour
• Compact "twin bridge" design
• Water resistant housing
• Carrying pouch and neck strap

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• Technologies: Quick guide to terms used in specifications:
• Roof prism: in roof prism binoculars the prisms overlap closely, allowing the objective lenses to line up directly with the eyepiece. The result is a slim, stream-lined shape in which the lenses and prisms are in a straight line.
• Magnification: in this case the object you view will appear 8 times closer than you would see it with the unaided eye.
• Objective Lens Diameter: the larger the objective lens, the more light that enters the binocular, and the brighter the image.
• Angle of View and Field of View: how many degrees and how many metres can be viewed through the binoculars at 1000m.
• Exit Pupil: calculated by dividing the objective diameter with the magnification the exit pupil is the diameter of the light coming through the binoculars and ideally should be equal to your eye iris for maximum effect. Average daytime dilation of the pupil is 3mm.
• Eye Relief: the recommended distance from the rear eye piece lens to your eye to see a clear image.
• Weight avg: 184g

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