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-09270.656x bi-telecentric lens, WD 208 mm 0.656xM72Large format208±3 mmF15.4dia. 90 mm$2,750.00 Ships in 3-4 weeks
LS-TCL-09530.853x bi-telecentric lens, WD 125 mm 0.853xM72Large format125±3 mmF6.0dia. 72.7 mm$2,800.00 Ships in 3-4 weeks
LS-TCL-08940.321x bi-telecentric lens, WD 288 mm 0.321xM58Full frame288±5 mm-dia. 136 mm$2,785.00 Ships in 3-4 weeks
LS-TCL-09350.738x bi-telecentric lens, WD 228 mm 0.738xM72Large format228±4 mmF9.9dia. 80 mm$2,585.00 Ships in 3-4 weeks
LS-TCL-09210.536x bi-telecentric lens, WD 263 mm 0.536xM72Large format263±4 mmF12.6dia. 110 mm$2,695.00 Ships in 3-4 weeks
LS-TCL-09260.609x bi-telecentric lens, WD 158 mm 0.609xM42, M58APS-H158±3 mmF11.5-$2,090.00 Ships in 3-4 weeks
LS-TCL-09030.396x bi-telecentric lens, WD 263 mm 0.396xM58Full frame263±4 mmF9.3dia. 110 mm$2,140.00 Ships in 3-4 weeks
LS-TCL-09560.929x bi-telecentric lens, WD 118 mm 0.929xF-mountAPS-H118±3 mmF15.3-$1,925.00 Ships in 3-4 weeks
LS-TCL-09510.813x bi-telecentric lens, WD 128 mm, F15.3 0.813xF-mountAPS-H128±3 mmF15.3-$1,925.00 Ships in 3-4 weeks
LS-TCL-09290.696x bi-telecentric lens, WD 128 mm 0.696xF-mountAPS-H128±3 mmF13.1-$1,980.00 Ships in 3-4 weeks
LS-TCL-09080.434x bi-telecentric lens, WD 300 mm 0.434x-Large format300±5 mm-dia. 136 mm$2,500.00 Ships in 3-4 weeks
LS-TCL-09070.433x bi-telecentric lens, WD 208 mm 0.433xF-mountAPS-H208±3 mmF10.2-$1,870.00 Ships in 3-4 weeks
LS-TCL-09520.813x bi-telecentric lens, WD 128 mm, F22.9 0.813xF-mountAPS-H128±3 mmF22.9-$1,870.00 Ships in 3-4 weeks
LS-TCL-09010.39x bi-telecentric lens, WD 258 mm 0.39xF-mountAPS-H258±4 mmF9.2-$1,870.00 Ships in 3-4 weeks
LS-TCL-09220.542x bi-telecentric lens, WD 178 mm 0.542xF-mountAPS-H178±3 mmF11.5-$1,870.00 Ships in 3-4 weeks
LS-TCL-09110.488x bi-telecentric lens, WD 228 mm 0.488xF-mountAPS-H228±4 mmF6.6-$1,870.00 Ships in 3-4 weeks
LS-TCL-09550.92x bi-telecentric lens, WD 138 mm 0.92xF-mountFull frame138±3 mmF25.9dia. 48 mm$790.00 Ships in 3-4 weeks
LS-TCL-09090.436x bi-telecentric lens, WD 258 mm 0.436xM58Full frame258±4 mm-dia. 100 mm$1,600.00 Ships in 3-4 weeks
LS-TCL-08970.355x bi-telecentric lens, WD 263 mm 0.355xM42, M58APS-H263±4 mmF8.3-$1,870.00 Ships in 3-4 weeks
LS-TCL-09230.545x bi-telecentric lens, WD 228 mm 0.545xF-mountFull frame228±4 mmF7.3dia. 80 mm$1,070.00 Ships in 3-4 weeks
LS-TCL-09711.083x bi-telecentric lens, WD 110 mm 1.083xF-mountAPS-H110±2 mmF18.3-$1,815.00 Ships in 3-4 weeks
LS-TCL-09701.038x bi-telecentric lens, WD 118 mm 1.038xF-mountFull frame118±3 mmF17.1dia. 42 mm$715.00 Ships in 3-4 weeks
LS-TCL-09460.8x telecentric lens, WD 130 mm, Coaxial, Variable Iris 0.8xC-mount2/3"130±2 mmF12.6-$355.00 Ships in 3-4 weeks
LS-TCL-09360.779x bi-telecentric lens, WD 138 mm 0.779xF-mountFull frame138±3 mmF14.6dia. 56 mm$790.00 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.