Leupold GR Compact Spotting Scope, Brown, 10-20 x 40mm

by Leupold


This product is currently out of stock.

Product ID: 659789

Description

  • Compact spotting scope in brown fits in cargo pocket; can be carried around neck with a lanyard
  • Use it handheld, or mount it on a trekking staff or tripod
  • Multi-coated lens system delivers a bright sight picture of exceptional clarity and contrast
  • Close focus distance of 5.5 feet; 3.8 to 2.6 degree field of view; 20 to 28.3 twilight factor rating
  • Waterproof; backed by full lifetime warranty
  • Offering waterproof, lightweight construction and excellent optical quality, Leupold's compact Golden Ring spotting
    scope gives you the performance of a much larger optic--use it handheld, or mount it on a trekking staff or tripod.
    Weighing just 15.8 ounces and 7.5 inches long, it's small enough to fit in a cargo pocket or carry around your neck on a
    lanyard. The multicoated lens system delivers a bright sight picture of exceptional clarity and contrast, with
    true-to-life color. This rugged, waterproof spotting scope is covered by the Leupold's Full lifetime warranty.

    Specifications:

    * Actual magnification: 10x to 19.9x
    * Linear field of view: 199 to 136 feet per 1000 yards/66 to 45 meters per 1000 meters
    * Angular field of view: 3.8 to 2.6 degrees
    * Objective aperture: 40mm
    * Twilight factor: 20 to 28.3
    * Exit pupil: 4 to 2mm
    * Eye relief: 18.5 to 17.2 mm
    * Close focus distance: 5.5 feet/1.7 meters
    * Weight: 15.8 ounces
    * Length: 7.5 inches

    Leupold Full Lifetime Guarantee
    If any Leupold Golden Ring product is found to have defects in materials or workmanship, Leupold will, at its option,
    repair or replace it. Even if you are not the original owner. No warranty card is required. No time limit applies.

    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.

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