The PF-100ED is the first fully waterproof and fog-proof 100mm objective spotting scope in the market. The straight-line optical barrel design of the PF-100ED makes it easy for the user to locate a subject quickly. It is housed in a lightweight magnesium-allow body and features time-proven porro-prism optics incorporating ED (Extra-low Dispersion) Lanthanum Crown (rare earth) glass elements to produce sharp, clear images with minimal chromatic aberration. PF-100ED also utilizes Pentax telescope eyepieces renowned for their sharpness, field of view, contrast and freedom from aberration. Used together, you have a world class-viewing instrument.

Features:

• The Pentax PF-100ED is housed in an exceptionally lightweight magnesium-alloy body.
• Incorporating Extra-low Dispersion (ED) glass elements for optimum optical resolution.
• Large 100mm objective lenses for bright viewing under all light conditions.
• The body of the PF-100ED incorporates the American standard 1 1/4-inch (31.7mm) - diameter eyepiece receptacle, which accepts the Pentax XL eyepieces.
• The receptacle has a special "O" ring assembly, which allows the body of the scope to be filled with nitrogen, making it fog proof and JIS Class 6 waterproof.
• A built-in lens shade cuts excessive light and helps to prevent rain and other weather elements from interfering with viewing.
• An extra wide focusing knob is incorporated for effortless focusing.
• A tripod socket with a click-stop rotation mechanism is available to allow for different viewing angle options.
• Famous Pentax Super-Multi-Coating maximizes light transmission, clarity and contrast.
• An extendable eyecup on the XL eyepieces allows variable adjustment for up to a full 20mm of eye relief, allowing those wearing eyeglasses the same view as non-eyeglass wearers.
• Equipped with a durable rubber housing to protect against shock and damage.
• Lanthanum Crown (rare earth) glass elements.
• The PF-100ED comes with a limited lifetime warranty.
• The PF-100ED accepts PENTAX XL Telescope Eyepieces: XL28 (22.5X), XL21 (30X), XL14 (45X), XL10.5 (60X), XL7 (90X) and the Zoom Eyepiece (20X-60X).