- Binocular with wide range of interpupillary adjustment to fit for anyone from youths to adults
- Compact size with boost of 8x magnification power and 30mm objective lens for wide field of view
- Fully multi-coated lenses ensure maximum brightness, clarity, contrast, and color fidelity
- Generous eye relief for comfortable extended viewing, even for inexperienced users
- Waterproof; backed by limited lifetime warranty
Product Features |
Product Description
Amazon.com Product Description
With their incredibly wide range of interpupillary adjustment, Yosemite binoculars fit the faces of more people than most full-size binoculars, making them the ideal optic for anyone from youths to adults. The 8x model features the same eye spacing adjustment and compact size of the 6x, with a boost of power. Fully multi-coated lenses ensure maximum brightness, clarity, contrast, and color fidelity. Generous eye relief for comfortable extended viewing, even for inexperienced users. This rugged, waterproof binocular is covered by the Leupold's limited lifetime warranty.
Specifications:
- Magnification: 8x
- Linear field of view: 393 feet per 1000 yards/131 meters per 1000 meters
- Angular field of view: 7.5 degrees
- Objective aperture: 30mm
- Twilight factor: 15.4
- Exit pupil: 3.8mm
- Eye relief: 14mm
- Interpupillary distance: 50 to 70mm
- Close focus distance: 16.4 feet/5 meters
- Weight: 18.5 ounces
- Length: 4.5 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.
Product Description
The 8x model features the same eye spacing adjustment and compact size of the 6x, with a boost of power. Smaller interpupillary distance settings (50mm to 70mm) give a wider range of people full use of the optics. Fully multi-coated lenses ensure maximum brightness, clarity, contrast, and color fidelity. A wide field of view for easy tracking. Generous eye relief for comfortable extended viewing, even for inexperienced users. Armor coated, rugged, and waterproof. Covered by the Leupold® Limited Lifetime Warranty. Available in our natural, black, or red finish.
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