Lenses

Telecentric lenses

How to choose a telecentric lens

Telecentric and bi-telecentric lenses keep magnification constant through the depth of field, so parts measure the same size wherever they sit. Pick by magnification (sensor size / field of view), working distance and the largest sensor you use.

Shop by sensor format: 4/3-inch telecentric lenses · 1.1-inch telecentric lenses · 1-inch telecentric lenses · 2/3-inch telecentric lenses · 1/1.8-inch telecentric lenses · 1/2-inch telecentric lenses · 1/2.5-inch telecentric lenses · APS-C telecentric lenses · APS-H telecentric lenses · Full frame telecentric lenses
Shop by mount: F-mount telecentric lenses · M58-mount telecentric lenses · M42-mount telecentric lenses · M72-mount telecentric lenses
Shop by magnification: 0.1x telecentric lenses · 0.2x telecentric lenses · 0.3x telecentric lenses · 0.4x telecentric lenses · 0.5x telecentric lenses · 0.6x telecentric lenses · 0.7x telecentric lenses · 0.8x telecentric lenses · 1x telecentric lenses · 1.5x telecentric lenses · 2x telecentric lenses · 2.5x telecentric lenses · 3x telecentric lenses · 4x telecentric lenses · 6x telecentric lenses

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Telecentric lenses

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LS-TCL-0677Fixed-magnification lens, 0.18x, 630 mm WD, 1" 0.18xC-mount1"630 mmF5.6$4,669.00 Ships in 2-3 weeks
LS-TCL-0681Fixed-magnification lens, 0.25x, 415 mm WD, 4/3" 0.25xC-mount4/3"415 mmF24.6$4,669.00 Ships in 2-3 weeks
LS-TCL-0665Fixed-magnification lens, 0.3x, 360 mm WD, 1" 0.3xC-mount1"360 mmF12.9$4,259.00 Ships in 2-3 weeks
LS-TCL-0575Fixed-magnification lens, 0.4x, 425 mm WD, 1.1" 0.4xC-mount1.1"425 mmF7$3,469.00 Ships in 2-3 weeks
LS-TCL-0584Fixed-magnification lens, 0.15x, 963 mm WD, 1.1" 0.15xC-mount1.1"963 mmF6.5$4,259.00 Ships in 2-3 weeks
LS-TCL-0583Fixed-magnification lens, 0.15x, 640 mm WD, 1.1" 0.15xC-mount1.1"640 mmF8$4,259.00 Ships in 2-3 weeks
LS-TCL-0678Fixed-magnification lens, 0.22x, 380 mm WD, 1" 0.22xC-mount1"380 mmF12.3$4,259.00 Ships in 2-3 weeks
LS-TCL-0664Fixed-magnification lens, 0.3x, 340 mm WD, 1" 0.3xC-mount1"340 mmF14.1$3,819.00 Ships in 2-3 weeks
LS-TCL-0585Fixed-magnification lens, 0.25x, 310 mm WD, 1.2" 0.25xC-mount1.2"310 mmF4.9$3,469.00 Ships in 2-3 weeks
LS-TCL-0668Fixed-magnification lens, 0.4x, 300 mm WD, 4/3" 0.4xC-mount4/3"300 mmF15$3,469.00 Ships in 2-3 weeks
LS-TCL-0599Object-side telecentric lens, 0.42x, 285 mm WD, 1" 0.42xC-mount1"285 mmF7$2,889.00 Ships in 2-3 weeks
LS-TCL-0588Fixed-magnification lens, 0.35x, 254 mm WD, 1.2" 0.35xC-mount1.2"254 mmF6.6$2,439.00 Ships in 2-3 weeks
LS-TCL-0645Object-side telecentric lens, 0.36x, 291 mm WD, 1", coaxial light port 0.36xC-mount1"291 mmF7.5$2,609.00 Ships in 2-3 weeks
LS-TCL-0654Object-side telecentric lens, 0.246x, 220 mm WD, 1.1" 0.246xC-mount1.1"220 mmF8$1,809.00 Ships in 2-3 weeks
LS-TCL-0667Fixed-magnification lens, 0.4x, 250 mm WD, 1" 0.4xC-mount1"250 mmF11$2,439.00 Ships in 2-3 weeks
LS-TCL-0574Fixed-magnification lens, 0.4x, 227 mm WD, 1.2" 0.4xC-mount1.2"227 mmF6.9$2,269.00 Ships in 2-3 weeks
LS-TCL-0573Fixed-magnification lens, 0.4x, 190 mm WD, 1.2" 0.4xC-mount1.2"190 mmF5.7$1,789.00 Ships in 2-3 weeks
LS-TCL-0609Object-side telecentric lens, 0.3x, 250 mm WD, 1" 0.3xC-mount1"250 mmF8$1,929.00 Ships in 2-3 weeks
LS-TCL-0619Object-side telecentric lens, 0.4x, 200 mm WD, 1.1" 0.4xC-mount1.1"200 mmF9$1,789.00 Ships in 2-3 weeks
LS-TCL-0674Fixed-magnification lens, 0.7x, 300 mm WD, 1.1" 0.7xC-mount1.1"300 mmF17.9$1,929.00 Ships in 2-3 weeks
LS-TCL-0579Fixed-magnification lens, 0.7x, 287 mm WD, 1.1" 0.7xC-mount1.1"287 mmF8$1,929.00 Ships in 2-3 weeks
LS-TCL-0618Object-side telecentric lens, 0.4x, 196 mm WD, 1" 0.4xC-mount1"196 mmF8$1,789.00 Ships in 2-3 weeks
LS-TCL-0592Fixed-magnification lens, 0.45x, 189 mm WD, 1.2" 0.45xC-mount1.2"189 mmF6.5$1,649.00 Ships in 2-3 weeks
LS-TCL-0617Object-side telecentric lens, 0.4x, 150 mm WD, 1", object-side resolution 15.1 ~ 53.7 μm 0.4xC-mount1"150 mmF9~32$1,649.00 Ships in 2-3 weeks

How to choose a telecentric lens

A telecentric lens keeps the image size of the part constant when the part moves closer or farther within the depth of field, and removes perspective, so edges and holes are measured at their true size. Choose by magnification, sensor and working distance.

1. Magnification = sensor size / field of view

The field of view is the sensor size divided by the magnification. Pick the magnification that fits the part with a small margin, or let the telecentric lens calculator work it out for your sensor and part:

MagnificationField of view, 2/3-inch sensor (8.8 x 6.6 mm)Field of view, 1.1-inch sensor (14.1 x 10.3 mm)
0.1x88 x 66 mm141 x 103 mm
0.2x44 x 33 mm70.5 x 51.5 mm
0.3x29.3 x 22 mm47 x 34.3 mm
0.5x17.6 x 13.2 mm28.2 x 20.6 mm
0.8x11 x 8.3 mm17.6 x 12.9 mm
1x8.8 x 6.6 mm14.1 x 10.3 mm
2x4.4 x 3.3 mm7.1 x 5.2 mm
4x2.2 x 1.7 mm3.5 x 2.6 mm

2. Sensor format

The lens must be rated for the camera's sensor format or larger, or the corners go dark. Larger sensors need larger (and longer) lenses with F-mount or M58 / M72 mounts.

3. Object-side or bi-telecentric

Object-side telecentric lenses keep the magnification constant as the part moves. Bi-telecentric lenses are telecentric on the camera side too, so small focus changes and sensor tilt do not change the size either: the choice for the highest measuring accuracy.

4. Working distance, depth of field, front size

Check the working distance against the space in the machine, and the depth of field against how much the part height varies. The front of the lens must be larger than the field of view - a telecentric lens only sees what fits in front of it.

5. Lighting

For silhouettes, pair the lens with a collimated backlight: parallel light gives the sharpest edges. For surface features use a coaxial light that fits the lens.