Leupold Cascades 8X42Mm Binocular black 53530

Leupold Cascades 8X42Mm Binocular black 53530 Review

Leupold Cascades 8X42Mm Binocular black 53530 Feature

• Rugged hunting binocular in black with 8x magnification and 42mm aperture
• Multi-coated lens system ensures maximum brightness for clarity, contrast, and color fidelity
• Generous eye relief and twist-up eyecups for comfortable extended viewing
• Close focus distance of 10 feet; 6.5 degree field of view; 18.3 twilight factor rating
• Waterproof; backed by limited lifetime warranty

One of the greatest values in current binoculars, the Leupold Cascades 8 x 42mm binocular offers serious optical performance in a slim, in-line design that's easy to grip in all weather conditions and a pleasure to take into the field. An outstanding low-light performer, the Cascades binocular's multi-coated lens system ensures maximum brightness for clarity, contrast, and color fidelity. It also features generous eye relief and twist-up eyecups for comfortable extended viewing, even with eyeglasses, and close focus distance of 10 feet. This rugged, waterproof binocular is covered by the Leupold's limited lifetime warranty. This rugged, waterproof binocular is covered by the Leupold's limited lifetime warranty.

Specifications:

• Magnification: 8x
• Linear field of view: 341 feet per 1000 yards/114 meters per 1000 meters
• Angular field of view: 6.5 degrees
• Objective aperture: 42mm
• Twilight factor: 18.3
• Exit pupil: 5mm
• Eye relief: 18mm
• Interpupillary distance: 58 to 72 mm
• Close focus distance: 9.9 feet/3 meters
• Weight: 22.9 ounces
• Length: 5.5 inches

What is Twilight Factor?
The factor that has the greatest impact on resolution or image detail, will be dependent upon the amount of light available during the time of observation. During daylight hours, when your eye pupil size will be only about 2 to 3mm, magnification will be the principal factor in image resolution. At night, with the eye pupil dilated to 6 to 8mm, aperture size is the controlling factor. In twilight conditions both of these factors control resolution effectiveness and the twilight factor is the term that compares binocular performance under these conditions.

The twilight factor is calculated by taking the square root of the product of the magnification and the aperture. The higher the twilight factor, the better the resolution of the binocular when observing under dim light conditions. For example, a 10 X 40 (twilight factor 20) would effectively resolve better under these conditions than a 7 X 35 (twilight factor 15.4) even though the 10 X 40 has a smaller exit pupil. Remember, however, that the twilight factor does not take into account the transmittance or quality of the optical system.

An outstanding low-light performer. The multi-coated lens system ensures maximum brightness for clarity, contrast, and color fidelity. Slim, in-line design is ergonomic and easy to grip in all weather conditions. Generous eye relief and twist-up eyecups for comfortable extended viewing, even with eyeglasses. Close focus distance of 10 feet. Rugged, waterproof, and covered by the Leupold® Limited Lifetime Warranty. Available in natural, black, Advantage® Timber¿ HD¿ camouflage, or Mossy Oak® Treestand¿ camouflage finish.