The GPO PASSION™ APO 16-48x65 is an angled compact spotting scope engineered for high-resolution observation across mid- to long-range distances. Built around an apochromatic (APO) objective lens system paired with proprietary GPObright™ multi-coatings, the optic achieves up to approximately 92% light transmission while eliminating chromatic aberration and edge distortion. Measuring 13.7 inches (348 mm) in length and weighing 46.0 to 47.0 oz (approx. 1.3 kg), the unit combines a rugged magnesium internal chassis, protective rubber armouring, and a glove-operable brass gear helical focus system for reliable field performance in demanding environments.

Key Features

• Apochromatic (APO) Optical System: Uses premium APO objective elements to suppress colour fringing and maintain edge-to-edge clarity across the full zoom range.
• Helical Brass Focus Collar: Features a central brass gear focus mechanism engineered for smooth, precise micro-adjustments in the field, even when operating with gloved hands.
• Magnesium Alloy Housing: Features a lightweight, weather-sealed magnesium chassis encased in textured rubber armour for structural durability in rough terrain.
• Ergonomic Angled Viewing: Incorporates a 45-degree angled eyepiece, an integrated sliding sunshade for glare control, and a rotating tripod collar with a standard 1/4"-20 female thread mount.

Product Specifications

• Magnification: 16x – 48x zoom
• Objective Lens Diameter: 65 mm
• Field of View: 138 ft to 74 ft at 1,000 yds (45.8 m to 24.6 m at 1,000 m)
• Eye Relief: 20.5 mm (at 16x) to 18.5 mm (at 48x)
• Exit Pupil: 4.1 mm (at 16x) to 1.4 mm (at 48x)
• Overall Length: 13.7 inches (approx. 348 mm)
• Weight: 46.0 – 47.0 oz (approx. 1,304 g)
• Mount Interface: Standard 1/4"-20 female tripod mount
• Power Source: Passive optical design (no batteries or electrical power required)

Who is the GPO Passion APO 16-48x65 for?

• Backcountry and mountain hunters — Carries easily over steep alpine terrain and long treks due to its packable 13.7-inch overall length and 46.0–47.0 oz weight, providing 16x to 48x zoom magnification for glassing game across distant ridgelines and open valleys.
• Long-range target shooters — Delivers the variable 16x to 48x magnification and a 65 mm objective lens needed to resolve projectile impacts, target details, and mirage at the range without adding excessive bulk to a shooting gear bag.
• Field birders and nature observers — Provides generous 20.5 mm to 18.5 mm eye relief and an apochromatic 65 mm objective lens for high-resolution, colour-accurate identification during mobile field observation.

Less suitable for: Stationary, vehicle-based glassing or extreme dawn-to-dusk twilight observation where maximum low-light performance is required; an 80–85mm objective spotting scope provides larger exit pupils and superior light gathering for those static scenarios.