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Telec
en
tr
ic L
enses
The World’s First Parfocal Telecentric Zoom Lens
The 12X Telecentric Zoom system allows users to reach a true telecentric
condition to within less than 0.3° while maintaining constant perspective
and magnifi cation. This means that even if the object is slightly out of
focus, the size of the image will not change. The 12X Telecentric Zoom
provides fi eld coverage from 50 mm down to 4 mm and the coaxial illumi-
nation allows clear viewing, even when working with mirror-like surfaces.
Also available without coaxial illumination.
Wide Magnifi cation Range and Ultra Long Working Distance
In the past, a telecentric lens was defi ned as having fi xed magnifi ca-
tion. Not anymore! The Navitar 12X Telecentric Zoom lens allows you
to zoom in and focus over a wide variety of magnifi cations with a higher
level of accuracy than you ever thought possible. The 12X Telecentric
Zoom provides adjustable focal lengths over a 0.16X to 1.94X magnifi ca-
tion range. You no longer have to be limited by telecentric lenses that
only off er fi xed magnifi cation. Now you have fi eld coverage from 50 mm
down to 4 mm at a 188 mm working distance.
Zoom Telecentric System
12X Telecentric Accuracy
Telec
en
tr
ic Er
ror O
ver D
epth
-0.04
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
0.04
0.00
0.50
1.00
1.50
2.00
1/4" format
1/3" format
1/2" format
Telecentric Error
(degrees)
Object
N.A.
Image
N.A.
Object
Depth of
Focus
(mm)
Telecentric Error
(mm)
Object Size
Approx.
MTF
(Ip/mm)
Resolvable
Features
(microns)
Mag.
1/4”
1/3”
1/2”
1/4”
1/3”
1/2”
1/4”
1/3”
1/2”
0.16
0.05
0.06
-0.03
0.005
0.032
38.8
0.018
0.020
-0.009
25.0
37.3
49.7
15
33
0.23
-0.10
-0.09
-0.18
0.007
0.031
19.4
-0.017
-0.016
-0.030
17.4
26.1
34.8
22
23
0.33
-0.19
-0.18
-0.27
0.010
0.030
10.3
-0.016
-0.016
-0.024
12.1
18.2
24.3
30
17
0.47
-0.23
-0.23
-0.31
0.013
0.028
6.0
-0.012
-0.012
-0.016
8.5
12.8
17.0
39
13
0.67
-0.25
-0.25
-0.34
0.016
0.024
3.8
-0.008
-0.008
-0.011
5.9
8.9
11.9
49
10
0.96
-0.27
-0.27
-0.36
0.020
0.021
2.6
-0.006
-0.006
-0.008
4.2
6.3
8.4
59
8
1.36
-0.29
-0.29
-0.38
0.024
0.017
1.8
-0.004
-0.005
-0.006
2.9
4.4
5.9
71
7
1.94
-0.25
-0.24
-0.29
-0.028
0.015
1.3
-0.003
-0.003
-0.003
2.1
3.1
4.1
84
6
Distortion < 0.1% for all magnifi cations. Working Distance = 188 mm for all magnifi cations.
12X Telecentric Lens Specifi cations
No Need to Change Lenses
The easily adjustable fi eld of view and magnifi cation allow
our Navitar 12X Telecentric lens to adjust to meet your
exact requirements. It’s no longer necessary to change
lenses, mix and match base lenses with attachment lenses
or recalibrate. One lens, the 12X Telecentric, really does
it all! Straight, as well as right angle, versions allow OEM
designers to best fi t the systems to their mechanical design.
Wide Range of Applications
Specifi cally designed for precise dimensional measurement
of objects or pattern recognition, the 12X Telecentric Zoom
has many applications. It’s ideal for measuring three-di-
mensional objects with deep features, such as well plates,
electrical connector pins, and other precision parts. It’s
also the perfect lens for viewing inconsistently placed parts
on a conveyer belt.
