| Model NO. | 4OB/7X40 |
| Magnification | 7X |
| Function | Waterproof, Fogproof |
| Usage | Astronomical, Gift, Bird Watching/Hunting, Travel |
| Lens | Glass |
| Objective Aperture | 30~50mm |
| Focusing Type | Center Focusing |
| Aperture | <50mm |
| Objective Dia | 40mm |
| Prism | Bak 4 |
| Coated | Fully Multicoated |
| Exit Pupil Distance | 21.5mm |
| Filed of View | 113m/1000 |
| Waterproof | Yes |
| Nitrogen Filled | Yes |
| Transport Package | Carton |
| Specification | 7x40 |
| Trademark | OEM or DONTOP |
| Origin | China |
| HS Code | 90051000 |
| Production Capacity | 100000PCS /Year |