Introduction
The lens determines what your camera sees—its field of view and level of detail. Fixed-lens cameras offer a set angle (e.g., 2.8 mm for wide views or 6 mm for narrow). Varifocal cameras let you adjust the focal length after installation, giving you flexibility to fine-tune coverage.
Fixed Lens Cameras
A fixed-lens camera has a single, non-adjustable focal length. Common options are 2.8 mm (wide, ~110°), 4 mm (medium, ~85°), and 6 mm (narrow, ~55°). They are simple, reliable, and ideal when you know the exact coverage needed beforehand.
Varifocal Cameras
Varifocal cameras offer a range—typically 2.8–12 mm—that can be adjusted remotely (motorised varifocal) or manually. This makes them versatile for locations where the optimal angle is uncertain until the camera is mounted and tested on-site.
Comparison
| Feature | Fixed Lens | Varifocal |
|---|---|---|
| Focal Length | Single (e.g., 2.8 mm) | Adjustable range (e.g., 2.8–12 mm) |
| Flexibility | None after install | High—adjust remotely |
| Cost | Lower | Slightly higher |
| Best For | Known coverage areas | Variable or uncertain angles |
FastEgy Recommendation
Use fixed-lens cameras for standard indoor areas where the viewing angle is predictable. Choose varifocal for entrances, hallways, and outdoor zones where you may need to adjust zoom post-installation. FastEgy stocks both types across all Hikvision ranges.
About FastEgy
FastEgy is a leading distributor of Hikvision, EZVIZ, and professional security solutions across Egypt. Visit fastegy.net or call us for expert consultation on your next surveillance project.