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-2630Bi-telecentric lens for 1.75" cameras, 0.517x, WD 138 mm 0.517xF-mount1.75"138±2 mm43.5x32.6 mm-From $2,099.00 Ships in 2-3 weeks
LS-TCL-2628Bi-telecentric lens for 1.75" cameras, 0.603x, WD 128 mm 0.603xF-mount1.75"128±2 mmØ 48 mm-From $1,909.00 Ships in 2-3 weeks
LS-TCL-2625Bi-telecentric lens for 1.75" cameras, 1.115x, WD 72 mm 1.115xF-mount1.75"72±2 mmØ 26 mm-From $1,409.00 Ships in 2-3 weeks
LS-TCL-2621Bi-telecentric lens for 59 mm cameras, 0.346x, WD 318 mm 0.346xF-mountLarge format318±4 mm-165.8 mm$4,859.00 Ships in 2-3 weeks
LS-TCL-2627Bi-telecentric lens for 1.75" cameras, 0.686x, WD 119 mm 0.686xF-mount1.75"119±2 mm32.8x24.6 mm-From $1,779.00 Ships in 2-3 weeks
LS-TCL-2626Bi-telecentric lens for 1.75" cameras, 0.798x, WD 111 mm 0.798xF-mount1.75"111±2 mmØ 36 mm-From $1,639.00 Ships in 2-3 weeks
LS-TCL-2623Bi-telecentric lens for 59 mm cameras, 0.245x, WD 410 mm 0.245xF-mountLarge format410±5 mm-234.2 mm$6,689.00Quote Ships in 2-3 weeks
LS-TCL-2620Bi-telecentric lens for 59 mm cameras, 0.392x, WD 301 mm 0.392xF-mountLarge format301±4 mm-146.4 mm$4,389.00 Ships in 2-3 weeks
LS-TCL-2614Bi-telecentric lens for 59 mm cameras, 0.735x, WD 229 mm 0.735xF-mountLarge format229±2 mm-78.0 mm$2,689.00 Ships in 2-3 weeks
LS-TCL-2619Bi-telecentric lens for 59 mm cameras, 0.432x, WD 288 mm 0.432xF-mountLarge format288±4 mm-132.8 mm$4,079.00 Ships in 2-3 weeks
LS-TCL-2618Bi-telecentric lens for 59 mm cameras, 0.528x, WD 251 mm 0.528xF-mountLarge format251±3 mm-108.7 mm$3,449.00 Ships in 2-3 weeks
LS-TCL-2617Bi-telecentric lens for 59 mm cameras, 0.63x, WD 254 mm 0.630xF-mountLarge format254±3 mm-91.1 mm$3,019.00 Ships in 2-3 weeks
LS-TCL-2613Bi-telecentric lens for 59 mm cameras, 0.817x, WD 178 mm 0.817xF-mountLarge format178±2 mm-70.2 mm$2,489.00 Ships in 2-3 weeks
LS-TCL-2611Bi-telecentric lens for 59 mm cameras, 0.92x, WD 187 mm 0.920xF-mountLarge format187±2 mm-62.3 mm$2,299.00 Ships in 2-3 weeks
LS-TCL-2608Bi-telecentric lens for 59 mm cameras, 1.256x, WD 128 mm 1.256xF-mountLarge format128±2 mm-45.7 mm$1,929.00 Ships in 2-3 weeks
LS-TCL-2606Bi-telecentric lens for 59 mm cameras, 1.396x, WD 119 mm 1.396xF-mountLarge format119±2 mm-41.1 mm$2,259.00 Ships in 2-3 weeks
LS-TCL-2612Bi-telecentric lens for 59 mm cameras, 0.916x, WD 159 mm 0.916xF-mountLarge format159±2 mm-62.6 mm$2,309.00 Ships in 2-3 weeks
LS-TCL-2590Bi-telecentric lens for 1/2.5" cameras, 0.03x, WD 410 mm, C-mount 0.030xC-mount1/2.5"410±5 mm190.0x142.6 mm-$6,659.00Quote Ships in 2-3 weeks
LS-TCL-2609Bi-telecentric lens for 59 mm cameras, 1.051x, WD 138 mm 1.051xF-mountLarge format138±2 mm-54.6 mm$2,119.00 Ships in 2-3 weeks
LS-TCL-2587Bi-telecentric lens for 1/2.5" cameras, 0.042x, WD 318 mm, C-mount 0.042xC-mount1/2.5"318±4 mm135.7x101.9 mm-$4,779.00 Ships in 2-3 weeks
LS-TCL-2605Bi-telecentric lens for 59 mm cameras, 1.626x, WD 111 mm 1.626xF-mountLarge format111±2 mm-35.3 mm$1,849.00 Ships in 2-3 weeks
LS-TCL-2603Bi-telecentric lens for 59 mm cameras, 2.264x, WD 72 mm 2.264xF-mountLarge format72±2 mm-25.4 mm$1,849.00 Ships in 2-3 weeks
LS-TCL-2586Bi-telecentric lens for 1/2.5" cameras, 0.048x, WD 301 mm, C-mount 0.048xC-mount1/2.5"301±4 mm118.7x89.1 mm-$5,429.00Quote Ships in 2-3 weeks
LS-TCL-2582Bi-telecentric lens for 1/2.5" cameras, 0.077x, WD 254 mm, C-mount 0.077xC-mount1/2.5"254±3 mm79.2x59.4 mm-$4,299.00 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.