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-10124x telecentric lens, WD 250 mm 4.0xC-mount250 mm0.008 μm--$200.00 Ships in 3-4 weeks
LS-TCL-09932x telecentric lens, WD 250 mm 2.0xC-mount250 mm13.4 μm1/2"F40$200.00 Ships in 3-4 weeks
LS-TCL-09681x telecentric lens, WD 250 mm 1.0xC-mount250 mm13.4 μm1/2"F20$200.00 Ships in 3-4 weeks
LS-TCL-09831.5x telecentric lens, WD 250 mm 1.5xC-mount250 mm13.4 μm1/2"F29.7$200.00 Ships in 3-4 weeks
LS-TCL-09500.8x telecentric lens, WD 250 mm, coaxial port 0.8xC-mount250 mm0.011 μm--$200.00 Ships in 3-4 weeks
LS-TCL-09190.5x telecentric lens, WD 250 mm 0.5xC-mount250 mm21.2 μm1/2"F15.9$200.00 Ships in 3-4 weeks
LS-TCL-09200.5x telecentric lens, WD 250 mm, coaxial port 0.5xC-mount250 mm0.009 μm--$200.00 Ships in 3-4 weeks
LS-TCL-09490.8x telecentric lens, WD 250 mm 0.8xC-mount250 mm14.6 μm1/2"F17.5$200.00 Ships in 3-4 weeks
LS-TCL-08900.3x telecentric lens, WD 250 mm, coaxial port 0.3xC-mount250 mm---$200.00 Ships in 3-4 weeks
LS-TCL-08890.3x telecentric lens, WD 250 mm 0.3xC-mount250 mm0.008 μm--$200.00 Ships in 3-4 weeks
LS-TCL-10258x telecentric lens, WD 65 mm 8.0xC-mount65 mm0.007 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10268x telecentric lens, WD 40 mm 8.0xC-mount40 mm0.008 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10237x telecentric lens 7.0xC-mount65 mm0.007 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10145x telecentric lens 5.0xC-mount65 mm0.008 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10216x telecentric lens, coaxial port, WD 65 mm 6.0xC-mount65 mm4.6 μm1/3"F39.2$195.00 Ships in 3-4 weeks
LS-TCL-09973x telecentric lens, WD 40 mm 3.0xC-mount40 mm0.008 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10186x telecentric lens, WD 40 mm 6.0xC-mount40 mm0.008 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10054x telecentric lens, WD 65 mm 4.0xC-mount65 mm6.0 μm1/3"F34.9$195.00 Ships in 3-4 weeks
LS-TCL-09963x telecentric lens, WD 65 mm 3.0xC-mount65 mm5.7 μm1/3"F24.8$195.00 Ships in 3-4 weeks
LS-TCL-10064x telecentric lens, WD 40 mm 4.0xC-mount40 mm0.008 μm--$195.00 Ships in 3-4 weeks
LS-TCL-10176x telecentric lens, WD 65 mm 6.0xC-mount65 mm4.6 μm1/3"F39.2$180.00 Ships in 3-4 weeks
LS-TCL-09872x telecentric lens, WD 40 mm 2.0xC-mount40 mm0.008 μm--$195.00 Ships in 3-4 weeks
LS-TCL-09862x telecentric lens, WD 65 mm 2.0xC-mount65 mm4.7 μm1/3"F13.7$195.00 Ships in 3-4 weeks
LS-TCL-04500.125× telecentric lens, 2/3", C-mount 0.125×C-mount157.8 mm10 μm2/3"-$9,729.00Quote Lead time confirmed with your quote

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.