Vice versa, when the distance from lens to object has to be reduced, the
focus of the lens will come to its limit. and the required magnification factor
an no more performed by the lens itself. In this case, a distance washer
tween the lens interface of the camera and the lens.
he length of the distance washer can be calculated as follows:
he required magnification factor is = 1 : 1)
alculated Length of the Distance Washer = 15
⋅
(5.6 : 5.6) = 15mm
c
has to be placed be
Distance Washer
T
Size
Object
Size
Sensor
Length
Focal
mm
Washer
Distance
e
CR Series
Ref. 1830-SU-02-G
Page 54
th
of
Length
⋅
=
]
[
Example:
Sensor Size as calculated above = 5.6mm
required Object Size=5.6mm
(T
focal length of the lens = 15mm
c
