CCTV Lens Calculator

1 ft. = 0.3048 m                  1 m = 3.281 ft.

Field of View Calculator


Calculate Field of View (FOV) 

Enter the CCD Chip Size, Lens Size, and Distance to Object:
Chip CCD Size:  1/2"
Lens Size:  mm
Distance to Object:  ft.

Angle of View:  deg.
Height:  ft.
Width:  ft.


Calculate Required Lens Size

Enter Chip CCD Size, Distance to Object and either the minimum required Scene Width or Height:
Chip CCD Size:  1/2"
Distance to Object:   ft.
Minimum Width:   ft.
(Or) Minimum Height:   ft.

Lens Size:   mm

Storage Calculatorr

Camera Stream:  H.264 (Our DVR's)

Camera Resolution:
 QCIF (176x120)
 CIF (352x240)
 D1 (704x480)
 1 Megapixel (1280x1024)
 2 Megapixel (1600x1200)
 3 Megapixel (2048x1536)

VIdeo Quality:  Highest 
Average Frame Size:  KB

Number of Cameras:  -10 -1 +1 +10

Frame Rate per Camera:  FPS
Motion Each Camera Will Record:  Hours Per Day
Desired Storage (# of Days) per Camera:  -10 -1 +1 +10

Total Bandwidth Required:  Per Camera: 

Estimated Storage:  
  • 1 frame per second is the lowest frame rate recordable and 30 frames per second is the maximum which is real time
  • There is no real need to record in real time unless there are regulatory reasons as in case of government facilities or casinos
  • Recording at 1 frame per second is what traditional analog systems record
  • At 3 - 5 frames per second recording you will not miss any activity (remember this is per second)