Objective Lens Size
Light gathering in early morning and late evening is essential for the hunter. The larger the size of the objective lens, the better the binocular will perform in low light.
Binocular design and ruggedness
Roof prism binoculars are built for rugged use in the field. Use a waterproof and fogproof binocular for protection in any season. Waterproof binoculars are sealed to prevent moisture, dust, and debris from getting inside the optics. Fogproof binoculars are filled with nitrogen or argon gas to inhibit internal fogging caused by temperature extremes.
Objective lens size
Light gathering in early morning and late evening is essential for the hunter. The last number (20–60 x 80) refers to the diameter of the objective lens in millimeters. The larger the size of the objective lens, the more light is gathered and the brighter your image will be.
Spotting scopes are available in:
If you're glassing at long distances, high magnifications may be necessary to capture details. The first numbers(20–60 x 80 or 30 x 80) refer to the magnification, or how many times larger an object will appear.
Spotting scope bodies are often packaged with an eyepiece. Some manufacturers sell eyepieces separately.
Spotting scope durability and design
Use a waterproof and fogproof spotting scope for protection in any season. Waterproof scopes are sealed to prevent moisture, dust, and debris from getting inside the optics. Fogproof scopes are filled with nitrogen or argon gas to inhibit internal fogging caused by temperature extremes.
Spotting scope bodies come in either angled or straight designs. Angled scope bodies make it easy to share a scope with people of different heights and can be positioned lower on a tripod for added stability.Straight scope bodies are comfortable to use and especially beneficial when viewing wildlife in the valley below.
Go to our definitive guide to understanding optics to clear up misconceptions like more is better when it comes to magnification or bigger objective lenses give a wider field of view. You'll also find glass quality and close focus covered in the guide.