828 Audubon
Swift Sport Optics has added a roof prism version of the world famous Audubon binocular. Using the same renowned 8.5x, 44 optical formula, BaK4 prisms, twist-up eyecups, and lightweight rubber armored body as the porro prism Audubons. The 828 offers fully multi-coated optics for high resolution viewing, close focus to under 9 ft., and a comfortable 19mm eye relief. The latest models incorporate a left diopter adjustment operated from the center focus knob for a more convenient quick focus.
Equipped with a neoprene neck strap, rainguard and objective lens covers, microfiber lens cloth and padded field case.
Features
- 5-Lens Ocular System
- BaK4 Prisms
- Fully Multi-coated Optics
- Center Focus Diopter Adjustment
- Waterproof, Fogproof & Shock Proof
- SwiftPremier Twenty Five Year Warranty
Specifications
| Prism Type | Roof, 8.5x44 |
| FOV @ 1000 yds/m | 336ft/112m |
| Weight | 23.4oz/664g |
| Close Focus | under 9ft/2.7m |
| Eye Relief | 19mm |
| Prisms | BaK4, Phase Coated |
| Lens Coating | Fully Multi-coated |
| Interpupillary | 57-73mm |
| Armored | Rubber Armor |
| Eyecups | Twist-up |
| Waterproof | Yes |