| Model NO. | 4584/8X42 |
| Function | Waterproof |
| Usage | Bird Watching/Hunting, Travel |
| Structure | Roof Prism |
| Lens Type | Prime Lens |
| Lens | Glass |
| Objective Aperture | 30~50mm |
| Focusing Type | Center Focusing |
| Aperture | <50mm |
| Objective Diameter | 42mm |
| Field of View | 142m/1000m |
| Exit Pupil Distance | 17.2mm |
| Exit Pupil Diameter | 5.2mm |
| Prisms Material | Bak4 |
| Eyepiece System | Twist-up |
| Lens Coating | Fully Multicoated |
| Transport Package | Carton |
| Specification | 8x42 |
| Trademark | OEM/DONTOP |
| Origin | China |
| HS Code | 90051000 |
| Production Capacity | 2000PCS /Week |