Optronis CamRecord CR Series, User Manual

Page: 74 / 89

CR Series Ref. 1830-SU-02-N Page 72
CR600x2
Full Sensor Resolution
The required focal length of the lens at full sensor resolution (1280 x 1024
Pixel) is calculated as follows:
A: Distance from lens to object in mm
B: Size of the object in mm
Example:
A: Distance from lens to object = 300 mm
B: Object Size = 100 mm
calculated focal length = (300 : (1 + (100 : 23))) = 56 mm
selected focal length = 50 mm
Reduced Sensor Resolution
At reduced sensor resolutions (e.g. 800 horizontal x 600 vertical pixels)
the focal length is calculated as follows:
23
B
1
A
] mm [ Length Focal
+
=
Object Size
2 2
D C 014 , 0 ] mm [ Size Sensor
+ ⋅ =