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-0822Standard telecentric lens, 4x, WD 110 mm, 2/3", C-mount 4xC-mount2/3"110 mmF223.7 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0835Standard telecentric lens, 2x, WD 65 mm, 2/3", C-mount 2xC-mount2/3"65 mmF13.54.5 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0838Standard telecentric lens, 3x, WD 65 mm, 2/3", C-mount 3xC-mount2/3"65 mmF163.5 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0837Standard telecentric lens, 3x, WD 65 mm, 2/3", C-mount 3xC-mount2/3"65 mmF163.5 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0839Standard telecentric lens, 4x, WD 65 mm, 2/3", C-mount 4xC-mount2/3"65 mmF183 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0823Standard telecentric lens, 6x, WD 110 mm, 2/3", C-mount 6xC-mount2/3"110 mmF354 μm$849.00 Ships in 2-3 weeks
LS-TCL-0814Telecentric lens 5x, WD 65 mm, M58 x 0.75-mount 5xM58Full frame65 mm±3%F12.2-236.71.7-31.3 μm$1,259.00 Ships in 2-3 weeks
LS-TCL-0480Bi-telecentric lens for 23x23 mm sensor, 0.12x, WD 410 mm, F/M58-mount 0.12xF-mount, M58APS-C410 mmF825 million pixels$5,039.00Quote Ships in 2-3 weeks
LS-TCL-0840Standard telecentric lens, 4x, WD 65 mm, 2/3", C-mount 4xC-mount2/3"65 mmF183 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0821Standard telecentric lens, 4x, WD 110 mm, 2/3", C-mount 4xC-mount2/3"110 mmF223.7 μm$1,239.00 Ships in 2-3 weeks
LS-TCL-0479Bi-telecentric lens for 23x23 mm sensor, 0.17x, WD 320 mm, F/M58-mount 0.17xF-mount, M58APS-C320 mmF825 million pixels$3,899.00 Ships in 2-3 weeks
LS-TCL-0478Bi-telecentric lens for 23x23 mm sensor, 0.19x, WD 300 mm, F/M58-mount 0.19xF-mount, M58APS-C300 mmF725 million pixels$3,609.00 Ships in 2-3 weeks
LS-TCL-0468Bi-telecentric lens for 23x23 mm sensor, 1.75x, WD 110 mm, F/M58-mount 1.75xF-mount, M581.5"110 mmF1125 million pixels$2,139.00 Ships in 2-3 weeks
LS-TCL-0473Bi-telecentric lens for 23x23 mm sensor, 0.36x, WD 230 mm, F/M58-mount 0.36xF-mount, M58APS-C230 mmF1825 million pixels$2,449.00 Ships in 2-3 weeks
LS-TCL-0477Bi-telecentric lens for 23x23 mm sensor, 0.21x, WD 285 mm, F/M58-mount 0.21xF-mount, M58APS-C285 mmF825 million pixels$3,209.00 Ships in 2-3 weeks
LS-TCL-0469Bi-telecentric lens for 23x23 mm sensor, 0.68x, WD 120 mm, F/M58-mount 0.68xF-mount, M58APS-C120 mmF1225 million pixels$1,839.00 Ships in 2-3 weeks
LS-TCL-0475Bi-telecentric lens for 23x23 mm sensor, 0.31x, WD 250 mm, F/M58-mount 0.31xF-mount, M58APS-C250 mmF1225 million pixels$2,659.00 Ships in 2-3 weeks
LS-TCL-0474Bi-telecentric lens for 23x23 mm sensor, 0.26x, WD 250 mm, F/M58-mount 0.26xF-mount, M58APS-C250 mmF825 million pixels$2,839.00 Ships in 2-3 weeks
LS-TCL-0470Bi-telecentric lens for 23x23 mm sensor, 0.63x, WD 130 mm, F/M58-mount 0.63xF-mount, M581.5"130 mmF7.525 million pixels$1,899.00 Ships in 2-3 weeks
LS-TCL-0476Bi-telecentric lens for 23x23 mm sensor, 0.55x, WD 250 mm, F/M58-mount 0.55xF-mount, M581.5"250 mmF825 million pixels$2,009.00 Ships in 2-3 weeks
LS-TCL-0471Bi-telecentric lens for 23x23 mm sensor, 0.45x, WD 158 mm, F/M58-mount 0.45xF-mount, M58APS-C158 mmF725 million pixels$2,189.00 Ships in 2-3 weeks
LS-TCL-0472Bi-telecentric lens for 23x23 mm sensor, 0.9x, WD 175 mm, F/M58-mount 0.9xF-mount, M581.5"175 mmF725 million pixels$1,679.00 Ships in 2-3 weeks
LS-TCL-0467Bi-telecentric lens for 23x23 mm sensor, 1.4x, WD 110 mm, F/M58-mount 1.4xF-mount, M581.5"110 mmF1125 million pixels$1,489.00 Ships in 2-3 weeks
LS-TCL-0466Bi-telecentric lens for 23x23 mm sensor, 0.8x, WD 110 mm, F/M58-mount 0.8xF-mount, M58APS-C110 mmF1825 million pixels$1,739.00 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.