Product guide

VARIFOCAL LENSES

Image Guide

Lenses

LensesCamerasHardware

Control

Room

IP Media &

Transmission

Radar

Detection

ANPRAccessories

VARIFOCAL LENS DISTANCE SELECTOR

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

15 - 36.0 24.0 18.0 14.4 12.0 10.3 9.0 8.0 7.2 6.5 6.0 5.5 5.1 4.8 4.5 4.2 4.0 3.8

14 - 33.6 22.4 16.8 13.4 11.2 9.6 8.4 7.5 6.7 6.1 5.6 5.2 4.8 4.5 4.2 4.0 3.7 3.5

13 - 31.2 20.8 15.6 12.5 10.4 8.9 7.8 6.9 6.2 5.7 5.2 4.8 4.5 4.2 3.9 3.7 3.5 3.3

12 - 28.8 19.2 14.4 11.5 9.6 8.2 7.2 6.4 5.8 5.2 4.8 4.4 4.1 3.8 3.6 3.4 3.2 3.0

11 52.8 26.4 17.6 13.2 10.6 8.8 7.5 6.6 5.9 5.3 4.8 4.4 4.1 3.8 3.5 3.3 3.1 2.9 -

10 48.0 24.0 16.0 12.0 9.6 8.0 6.9 6.0 5.3 4.8 4.4 4.0 3.7 3.4 3.2 3.0 2.8 - -

9 43.2 21.6 14.4 10.8 8.6 7.2 6.2 5.4 4.8 4.3 3.9 3.6 3.3 3.1 2.9 - - - -

8 38.4 19.2 12.8 9.6 7.7 6.4 5.5 4.8 4.3 3.8 3.5 3.2 3.0 - - - - - -

7 33.6 16.8 11.2 8.4 6.7 5.6 4.8 4.2 3.7 3.4 3.1 2.8 - - - - - - -

6 28.8 14.4 9.6 7.2 5.8 4.8 4.1 3.6 3.2 2.9 - - - - - - - - -

5 24.0 12.0 8.0 6.0 4.8 4.0 3.4 3.0 - - - - - - - - - - -

4 19.2 9.6 6.4 4.8 3.8 3.2 - - - - - - - - - - - - -

14.4 7.2 4.8 3.6 2.9 - - - - - - - - - - - - - -

9.6 4.8 3.2 - - - - - - - - - - - - - - - -

4.8 - - - - - - - - - - - - - - - - - -

Scene Width (m)

Object Distance (m)

Selecting a lens

1) Determine the scene width (actual size of area & view required)

2) Calculate the distance between the scene and the camera

3) Read off the focal length of lens required from the chart

Example: Scene width =7m, Object distance =7m

Focal length of lens required = 4.8mm

Scene width

Distance

to object

COMPARISON OF MONITORING IMAGES Images on 1/3

” camera