can no more performed by the lens itself. In this case, a distance washer
has to be placed between the lens interface of the camera and the lens.
Distance Washer
The length of the distance washer can be calculated as follows:
Size
Object
Size
Sensor
Length
Focal
mm
Washer
Distance
e
th
of
CR Series
Ref. 1830-SU-02-G
Page 48
Length
⋅
=
]
[
Example:
Sensor Size as calculated above = 12mm
required Object Size=12mm
(The required magnification factor is = 1 : 1)
focal length of the lens = 35mm
calculated Length of the Distance Washer = 35
⋅
(12 : 12) = 35mm
