Swarovski Optik 48885 85 mm modular objective, Arca Swiss, green

85 mm modular objective for spotting scopes

The Swarovski Optik 48885 is an 85 mm objective module designed for the ATX, STX and BTX spotting scope systems. It provides a 25x to 60x magnification range when paired with a compatible eyepiece module. The unit features extra low-dispersion fluoride HD glass with SWAROTOP and SWARODUR anti-reflective coatings. A nitrogen-filled magnesium body makes it waterproof and fog proof for hiking and outdoor observation.

Sustained optical performance in the field

The large 85 mm aperture gathers significantly more light than smaller modules, maintaining bright, high-contrast images during extended low-light sessions such as dawn or dusk viewing. Fluoride HD glass and multi-layer coatings suppress chromatic aberration and flare consistently across the full zoom range. Nitrogen purging prevents internal fogging when temperatures shift over long periods. The field-flattener lens system preserves edge-to-edge sharpness throughout prolonged digiscoping or observation sessions.

Arca-Swiss mounting and eyepiece requirement

An integrated Arca-Swiss-compatible tripod shoe with a rotating collar allows quick attachment and level adjustment on compatible heads without additional plates. The module is not a complete spotting scope; a separate eyepiece module (ATX, STX or BTX) must be purchased and attached before use. Buyers who want an all-in-one unit or who lack a compatible eyepiece module cannot use this objective on its own. The magnesium chassis keeps weight down, but the 7.4 in by 15.1 in by 5.1 in dimensions still require a sturdy tripod for stable viewing.