The Optisan LR 10x42 is a roof prism binocular with an open-bridge design, conceived as a companion for every outdoor outing: birdwatching, hiking, nature observation and hunting. Lightweight and fitted with a neoprene strap, it is comfortable to carry all day and suits the whole family.
The open bridge provides a natural, stable grip, letting you hold the binocular in one hand and focus with the other. The 10x magnification brings distant subjects closer, while the 42 mm objective combines good brightness and portability; the manufacturer states 80% total light transmission and a Japanese-designed optical system that reduces edge distortion and chromatic aberration. It is IPX7 waterproof (immersion up to 1 m for 30 minutes), fogproof and nitrogen-purged.
Key features
Magnification: 10x
Objective diameter: 42 mm
Prisms: BaK4 with phase-correction and silver coating
Fully multi-coated optics
Field of view: 108 m at 1000 m (6.2°)
Eye relief: 16 mm
Exit pupil: 4.2 mm
Close focus: 2.5 m
Interpupillary distance: 56-76 mm
Diopter compensation: ± 4.0 dpt
Focusing: centre focus
Eyecups: twist-up, removable
Body: Swissamotec 98™, open-bridge design
Colour: brown (Chestnut Brown)
Dimensions (W x H x D): 153 x 130 x 60 mm
Weight: 650 g
Waterproofing: IPX7, nitrogen-purged
Operating temperature: -10 to +50 °C
Recommended use
Suited to birdwatching, long-distance nature observation, hiking and hunting, when higher magnification is needed to recognise details, even in bad weather thanks to IPX7 sealing.