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.
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.
Purchased these a week ago, and haven’t been able to put them down. They are shockingly similar in overall quality to a pair of 8×30 Swarovski SLC binoculars I used for several years but lost. Center sharpness and contrast are excellent, and even edge sharpness is very good- which is surprising for a binocular of this low price. The weatherproofing has already handled snow and rain, with no difficulties. Coatings on lenses and prisms seem to be excellent, given great low light performance, as well as almost no color distortion- even in difficult lighting conditions. (Just did early morning bird watching with some snow on the ground and the sun rising- no color distortion- even on edges of brightest, whitest areas.) The only improvement I can think of for these, at this price, is a wider field of view- but the 6.5 degrees is still totally acceptable- just not quite the 8 degrees plus I was used to from the Swarovski. But we’ll let that slide because of the 0 savings!!!! Also, if you destroy these, you won’t feel the need to purchase them a burial site. 0 isn’t cheap for me, but it sure beats 0. As a side note, these binoculars can even handle direct viewing of bright lights at night, with very little flaring. This is a great test of lens coating and internal “baffling” to keep views clear. Also, the strap that comes with these is the best I have ever seen- it has a stretch fabric pad on it at the neck portion- which makes it as though you aren’t even wearing them. I have read complaints about the lens caps in reviews on other sites, which say they fall off easily. I don’t use caps when I carry them, so this isn’t an issue. Also, the lenses are set back into the rubber armoured surround- so it would be challenging to find a way to scratch the lenses anyway. Also, no offense to Nikon, but I did a side by side of these and the 8×42 monarchs at a sporting goods store- the performance is similar, but the view through Leupolds is MUCH brighter. FOR THE PRICE, THIS IS A 5 STAR PRODUCT.
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Where to buy cheap prices? -Leupold Cascades 8X42Mm Binocular black 53530 $249.98
*** Product Information and Prices Stored: Jul 26, 2010 06:55:27
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