CCTV Field of View Planning
A field of view plan helps you place a camera with less guesswork. It shows the visible scene width, scene height, viewing angles, and pixel density at a chosen distance. These values matter because a wide lens may see more area, yet it spreads pixels across a larger scene. A narrow lens sees less area, yet it can show faces, plates, or objects with stronger detail.
Why Lens And Sensor Size Matter
The lens focal length and sensor size control the angle. A shorter focal length gives a wider view. A longer focal length gives a tighter view. The same lens can also behave differently on another sensor. That is why this calculator lets you choose a sensor preset or enter a custom width and height. It also uses camera resolution, because real security value depends on coverage and detail.
Using Pixel Density
Pixel density tells how many image pixels cover one real meter or foot. Higher density supports better review and identification. Lower density may still work for basic observation. The calculator compares your result with simple surveillance levels. Use these levels as planning guides, not fixed promises. Lighting, focus, compression, motion blur, mounting height, and weather can change actual image quality.
Planning Camera Positions
Start with the distance from camera to target. Enter the lens size and sensor dimensions. Add the resolution. Then review the visible width and height. If the scene is too wide, use a longer lens or move the camera closer. If the scene is too narrow, use a shorter lens or move the camera back. Check overlap when several cameras cover one zone.
Practical Field Notes
For entrances, plan enough pixels on a face near the door. For parking areas, check the plate or vehicle distance. For warehouses, calculate each aisle separately. Always test the view on site before final mounting. The calculator gives a solid estimate, but brackets, walls, shelves, glare, and lens distortion can affect the final picture. Keep notes from each calculation. Export the result and compare several lens choices before ordering equipment or drilling holes. Save the exported file with site drawings, camera names, and installer comments. This makes later maintenance easier for security teams.