Spotting scope focus Optimum 20-60x85 APO ED — 20–60× magnification, 85 mm objective

Focus Optimum 20-60x85 APO ED is a spotting scope with variable 20–60× magnification and an 85 mm objective lens. The APO ED optical design reduces chromatic aberration and improves color fidelity and contrast across the zoom range, delivering high-resolution images for distant subjects. The scope is engineered for tripod use and outdoor observation, offering a large objective aperture for better light gathering in low-light conditions and stable long-range viewing.

Advantages

The APO ED glass minimizes color fringing and enhances sharpness, providing clear detail at high magnifications. The 20–60× zoom range allows flexible framing and target acquisition from mid- to long-range distances. An 85 mm objective provides improved light transmission, which helps in dawn, dusk and shaded environments. The optical construction and focus mechanism are designed for precise, repeatable adjustments suited to fieldwork.

Suitable for

• Birdwatching and wildlife observation
• Long-range landscape and detail observation
• Outdoor fieldwork that requires tripod-mounted optics
• Astro-sky viewing of bright targets

Key specifications

• Magnification: variable 20× to 60×
• Objective diameter: 85 mm
• Optical type: apochromatic extra-low dispersion (APO ED)
• Suitable mounting: tripod-compatible design
• Intended use: long-range observation and high-resolution detail

How to use

Mount the spotting scope on a stable tripod and secure the fixing plate. Start at the lowest magnification (20×) to locate and center the subject, then gradually increase magnification to refine framing and view finer details. Use the focus ring to obtain a sharp image; small, precise adjustments yield best results at higher magnifications. For low-light observation, allow a few moments for eyes to adapt and use the widest objective aperture setting available.

Usage recommendations

For optimal performance, use a sturdy tripod to minimize vibration, select lower magnification when tracking moving subjects, and protect the optics from moisture and dust. Regularly check and clean external lenses with appropriate optical cleaning tools and cover the objective when not in use.