Lens Angle Comparison

The following chart displays the comparison of CCTV lens with the regular 135mm film camera lens.

CCTV lens
135mm lens
   
focal length Angle Angle focal length    
2.5mm 120° 114° 14mm
3.6mm 92° 94° 20mm
4.3mm 78° 75° 28mm
6.0mm 53° 51° 45mm

Standard lens for 135mm camera Regular angle of our eyes vision

12mm 25° 24° 100mm
25mm 18° 18° 135mm

Canon-USA has a visual comparison chart of their lens.
Please visits them. It is fun to find out how wide is 120° or 18°.