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-10440.055x bi-telecentric lens, WD 465 mm, 1", C-mount 0.055xC-mount1"465±6 mmdia. 300 mm-$8,560.00Quote Ships in 3-4 weeks
LS-TCL-10500.11x bi-telecentric lens, WD 300 mm, 1", C-mount 0.11xC-mount1"300±5 mmdia. 150 mmF6.5$2,350.00 Ships in 3-4 weeks
LS-TCL-10510.122x bi-telecentric lens, WD 288 mm, 1", C-mount 0.122xC-mount1"288±5 mmdia. 136 mmF6.5$2,350.00 Ships in 3-4 weeks
LS-TCL-10520.138x bi-telecentric lens, WD 273 mm, 1", C-mount 0.138xC-mount1"273±5 mmdia. 120 mmF6.5$2,350.00 Ships in 3-4 weeks
LS-TCL-10490.098x bi-telecentric lens, WD 318 mm, 1", C-mount 0.098xC-mount1"318±5 mmdia. 170 mmF6.5$3,000.00 Ships in 3-4 weeks
LS-TCL-10560.208x bi-telecentric lens, WD 228 mm, 1", C-mount 0.208xC-mount1"228±4 mmdia. 80 mmF6.5$1,720.00 Ships in 3-4 weeks
LS-TCL-10550.184x bi-telecentric lens, WD 208 mm, 1", C-mount 0.184xC-mount1"208±3 mmdia. 90 mmF6.5$1,925.00 Ships in 3-4 weeks
LS-TCL-10570.231x bi-telecentric lens, WD 178 mm, 1", C-mount 0.231xC-mount1"178±3 mmdia. 72 mmF6.5$1,285.00 Ships in 3-4 weeks
LS-TCL-10540.166x bi-telecentric lens, WD 258 mm, 1", C-mount 0.166xC-mount1"258±4 mmdia. 100 mmF6.5$1,875.00 Ships in 3-4 weeks
LS-TCL-10610.346x bi-telecentric lens, WD 138 mm, 1", C-mount 0.346xC-mount1"138±3 mmdia. 48 mmF9.8$850.00 Ships in 3-4 weeks
LS-TCL-10530.151x bi-telecentric lens, WD 263 mm, 1", C-mount 0.151xC-mount1"263±4 mmdia. 110 mmF6.5$1,875.00 Ships in 3-4 weeks
LS-TCL-10620.395x bi-telecentric lens, WD 118 mm, 1", C-mount 0.395xC-mount1"118±3 mmdia. 42 mmF6.5$770.00 Ships in 3-4 weeks
LS-TCL-10590.296x bi-telecentric lens, WD 138 mm, 1", C-mount 0.296xC-mount1"138±3 mmdia. 56 mmF6.5$1,060.00 Ships in 3-4 weeks
LS-TCL-10580.259x bi-telecentric lens, WD 158 mm, 1", C-mount 0.259xC-mount1"158±3 mmdia. 64 mmF6.5$1,060.00 Ships in 3-4 weeks
LS-TCL-10630.46x telecentric lens, 1" 0.46xC-mount1"220±3 mm-F11.6$700.00 Ships in 3-4 weeks
LS-TCL-10600.346x bi-telecentric lens, WD 128 mm, 1", C-mount 0.346xC-mount1"128±3 mmdia. 48 mmF6.5$850.00 Ships in 3-4 weeks
LS-TCL-10650.46x bi-telecentric lens, WD 110 mm, 1", C-mount 0.46xC-mount1"110±2 mmdia. 36 mmF7.8$750.00 Ships in 3-4 weeks
LS-TCL-10660.5x telecentric lens, 1" 0.5xC-mount1"220±3 mm-F8$670.00 Ships in 3-4 weeks
LS-TCL-08660.197x bi-telecentric lens, WD 465 mm 0.197xM72Large format465±6 mmdia. 300 mmF9$9,080.00Quote Ships in 3-4 weeks
LS-TCL-10640.46x telecentric lens, 1", 0.46x Coaxial 0.46xC-mount1"220±3 mm-F11.6$750.00 Ships in 3-4 weeks
LS-TCL-10680.638x bi-telecentric lens, WD 73 mm, 1", C-mount 0.638xC-mount1"73±1 mmdia. 26 mmF8.7$645.00 Ships in 3-4 weeks
LS-TCL-10670.5x telecentric lens, 1", with coaxial light 0.5xC-mount1"220±3 mm-F8$715.00 Ships in 3-4 weeks
LS-TCL-08690.225x 90° bi-telecentric lens, WD 465 mm 0.225xM72Large format465 mm-F6.6$9,000.00Quote Ships in 3-4 weeks
LS-TCL-08700.225x bi-telecentric lens, WD 465 mm, M72, BFL 19.5 mm 0.225xM72Large format465±6 mmdia. 300 mm-$9,000.00Quote Ships in 3-4 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.