Security Camera and CCTV Reference Guide


Common Lenses Focal Length to Viewing Angle
Gigastrand uses cameras with 1/3″ CCD or larger. Gigastrand prefers the lenses highlighted in green. Most budget manufacturers use lenses in the 6mm range. The wider the viewing angle, the more can be captured with a single camera and fewer cameras will be required to capture the same area.

Lens(mm)1/3″CCD
Left/Right
1/3″CCD
Up/Down
1/4″CCD
Left/Right
1/4″CCD
Up/Down
2.5mm96.4°86.2 °81.9°72.9°
2.8mm89.9°79.8°75.6°66.8°
3.6mm75.7°66°62.2°54.3°
4mm69.9°60.7°57°49.5°
6mm50°42.6°39.8°34.2°
8mm38.5°32.6°30.4°26°
12mm26.2°22.1°20.5°17.5°
16mm19.8°16.6°15.4°13.2°
30mm10.6°8.9°8.3°
60mm5.3°4.5°4.1°3.5°
100mm3.2°2.7°2.5°2.1°
200mm1.6°1.3°1.2°1.1°

CCTV Power over Ethernet (PoE) Successful Runs
Gigastrand has successfully run 5v and 12v power down the following cable lengths. Beyond that, it is advisable to power the camera locally or use a higher voltage to transmit the power and step down at the camera.

5v – Up to 100ft Cat5e using 2 pair
12v – Up to 250ft Cat5e using 2pair

Wiring for PoE (B)
Gigastrand will use adaptors or custom connector wiring (sometimes referred to as “poor man’s” PoE) to create PoE connections.

PinFunction
1Data
2Data
3Data
4PoE +
5PoE +
6Data
7PoE –
8PoE –