Doerr
Binoculars

Doerr Danubia-21

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Tech specifications and features

Main characteristics
Type: binoculars;
Increase: 7-21x;
Lens diameter: 21 mm;
Exit pupil diameter: 1-3 mm;
Field of view at 1,000 yards: 38-84 m;
Characteristics
Type of prism: Porro;
The relative brightness: 9;
Twilight factor: 21-12 .1;
Adjusting the distance between the eyes: yes;
Design
Focus: Central;
Features optics: multi-layer lens coating;
Case: shock-resistant rubber;
Additionally
Width: 108 mm;
Length: 90 mm;
Weight: 275 g;
Body color: grey;
Additional information: prism BAK-4;
 
 
 
 
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