Seven by fifty is the long-standing marine binocular format: enough magnification to read a buoy number, a wide exit pupil for brightness at dusk, and low enough power to hold steady on a moving deck. The Commander is Steiner's implementation.
The optics use the Sports-Auto-Focus system, which keeps subjects from 20 metres to infinity in focus without adjustment. The field of view is approximately 140 metres at 1,000 metres.
The housing is nitrogen-filled against internal fogging and waterproof to 10 metres, with rubber armouring. Steiner's Nano-Protection hydrophobic coating is applied to the lenses so spray beads off. A compass variant adds an integrated HD compass for taking bearings.
Product imagery courtesy of Steiner.
Specifications
Specifications as published by the maker. Verify current details with the maker or a dealer before acting on them.
| Magnification / objective | 7x / 50 mm |
|---|---|
| Field of view | Approx. 140 m at 1,000 m |
| Focus | Sports-Auto-Focus, 20 m to infinity |
| Waterproofing | 10 m, nitrogen-filled |
| Lens coating | Nano-Protection hydrophobic |
| Compass | Integrated HD compass (compass variant) |
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