The Oberwerk Sport APO 10x40 binoculars are a compact model with roof prisms, designed for nature, field, travel, landscape, and astronomical observation. They belong to the Sport APO series, which uses an apochromatic optical system with Extra-low Dispersion FK-61 and Super-low Dispersion FCD100 glass, dielectric and phase coatings, and field-flattener elements. The 10x magnification provides greater observational reach while maintaining the compact format of 40 mm binoculars.

Key features

• compact binoculars with roof prisms from the Sport APO series
• 10x magnification and 40 mm objective lenses
• optical system with Extra-low Dispersion FK-61 and Super-low Dispersion FCD100 glass
• apochromatic design reducing chromatic aberration
• dielectric and phase coatings
• field-flattener elements for better sharpness from the center to the edge of the field of view
• 4.0 mm exit pupil for easier observation in limited light conditions
• central focusing with a precise, slow-focus mechanism
• central, internal diopter adjustment
• twist-up eyecups with 5 click-stop positions
• ergonomic housing with sculpted thumb indents and a textured grip
• magnesium alloy body
• waterproof construction
• low weight and compact dimensions for easier handheld observation

Technical specifications

• model: Oberwerk Sport APO 10x40
• SKU: SA1040
• optical design: binoculars with roof prisms
• magnification: 10x
• objective lens diameter: 40 mm
• optical glass: Extra-low Dispersion FK-61, Super-low Dispersion FCD100
• prism coatings: dielectric, phase
• field-flattener elements: yes
• eye relief: 17 mm
• exit pupil: 4.0 mm
• interpupillary distance range: 56-72 mm
• minimum focus distance: 2 m
• focusing system: central
• diopter adjustment: central, internal
• eyecups: twist-up, 5 positions
• body: magnesium alloy
• waterproof: yes
• length: 6.2"
• width: 4.7"
• depth: 2"
• weight: 1.5 lb / approximately 680 g