| Model NO. | 3J/12X42 |
| 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 | 114m/1000m |
| Eyepiece Diameter | 23mm |
| Exit Pupil Distance | 10mm |
| Nearest Focus Distance | 2.5m |
| Lens Group | 5e/3G |
| Focus System | Center + Right Eyepiece |
| Waterproof | Rain Proof |
| Transport Package | Carton |
| Specification | 12X42 |
| Trademark | OEM/DONTOP |
| Origin | China |
| HS Code | 90051000 |
| Production Capacity | 2000PCS /Week |