Pentax

<p>These binoculars offer gratifyingly good viewing for their size and price. In their modified porro-prism design, only the eyepieces move to adjust the width, reducing misalignment from knocks and hard use.</p><ul><li>Impact-resistant polycarbonate body with rubber coating for easy gripping</li><li>Aspherical lens elements help ensure sharp edge-to-edge views</li><li>Multi-coated optical elements</li><li>2.8mm close focus will delight birders</li><li>BaK4 high index prisms for good edge-to-edge resolution</li><li>8x magnification is great for general use</li><li>15mm eye relief allows them to be used with glasses</li><li>3.1mm exit pupil</li><li>25mm objective lenses</li><li>Twist-up eyecups are easy to use and last longer than fold-down rubber</li></ul>

Pentax 8x25 UCF-X II Binoculars

This tells you how many times an object is magnified when observed through the binoculars.

The diameter of the objective lens will impact how bright, sharp, and comfortable your view is. Generally, bigger is better.

Lens coatings reduce light loss and glare to increase contrast and diminish eyestrain. Coated: one layer on external surfaces only. Fully coated: every surface is coated. Multi-coated: multiple layers on some of the surfaces. Fully multi-coated: multiple layers on every optical surface.

The widest dimension of circular viewing area that you can see.

The nearest distance at which the binoculars will focus on an object.

A measure of image brightness. The greater the realtive brightness number the better the binoculars will perform in dim light.

The diameter of the objective (outside) lens divided by the binocular's magnification. It indicates the amount of light that reaches your eye (most noticeable in low light conditions). Higher numbers offer brighter images.

The distance between the eyepiece and your eye while still allowing entire field of view. Long eye relief is good for eyeglass wearers.

Waterproof binoculars are assembled with O-rings and are purged with nitrogen to avoid condensation. They are ideal for boating or use in rainy weather.

These binoculars can be adjusted for variances between right and left eye vision.

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Pentax 8x25 UCF-X II Binoculars

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