Product Overview

The Pentax SMC 8–24mm Zoom Eyepiece is built for people who actually get out and use their glass. Drop it into a Pentax PF‑65, PF‑80 or PF‑100 spotting scope – or any telescope that takes 1.25" accessories – and you’ve instantly got a clean, sharp zoom range that’s genuinely useful in the field. The lanthanum glass and full Pentax SMC multi‑coatings keep the image bright and neutral, with very little flare or colour fringing, so you can pick fine detail out of heat haze or low light without fighting your optics.

Eye relief runs a generous 18–22mm, so if you wear specs you can still see the full field without having to jam your glasses into the eyecup. The zoom ring has positive, glove‑friendly grip and the barrel markings make it easy to know roughly where you are in the 8–24mm range, whether you’re glassing a distant hillside or tracking birds on the move. It’s JIS Class 4 waterproof and fogproof, so sudden weather changes or coastal humidity won’t stop play, and the 1.25" filter thread lets you run standard astronomical or contrast filters when you need to tame glare. In short, it’s a tough, no‑nonsense zoom eyepiece that gives Pentax‑grade performance for both terrestrial and astro work.

Key Features

• 8–24mm zoom focal length range lets you quickly dial in the ideal magnification for changing targets and viewing conditions.
• Generous 18–22mm eye relief provides comfortable viewing, even for users wearing glasses, reducing eye strain during long observation sessions.
• Pentax SMC full-surface multi-layer coatings maximise light transmission and colour fidelity, delivering bright, high-contrast images in low-light environments.
• High-refraction, low-dispersion lanthanum glass minimises chromatic aberration, helping maintain sharp, detailed views across the zoom range.
• JIS Class 4 waterproof and fogproof construction protects the eyepiece from rain and moisture, making it reliable for all-weather field use.
• Standard 1.25" barrel diameter ensures broad compatibility with Pentax spotting scopes and many astronomical telescopes, increasing versatility across setups.
• Up to 60° apparent field of view gives a wide, immersive image, making it easier to locate and track wildlife or celestial objects.
• Six-element optical design with blackened lens edges reduces internal reflections and ghosting, improving contrast and image clarity.
• Rubber eyecup and knurled zoom collar offer secure grip and comfortable positioning, aiding precise, quick adjustments in the field.
• Robust metal and rubberised construction adds durability and impact resistance, suitable for frequent outdoor use and travel.