Machine Vision Lenses and Optics - STEMMER IMAGING


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Opto Engineering TCZR

8x bi-telecentric zoom lenses with motorised control

If the flexibility of a zoom lens and the accuracy of fixed optics is required with your imaging and measurement application, then the TCZR series from Opto Engineering is a great solution.

Four different magnification levels (featuring a total range of 8x), can be selected either the on board control keyboard or via a computer with the specific remote control software.

Reasons to choose the Opto Engineering TCZR

Perfect magnification consistency and parfocality

The very accurate mechanism within the lens ensures unequalled magnification, focusing and image center stability when switching from one magnification to another. Thus avoiding the need for re-calibration at any given time.

Exceptional accuracy

Bi-telecentricity, high resolution and low distortion enable these zoom lenses to perform the same measurement tasks as a fixed magnification telecentric lenses.

Advantages of telecentric lenses

With standard lenses an object appears to be smaller or bigger when it is closer or farther away from the lens. Unlike common optics, telecentric lenses only accept incoming ray bundles that are parallel to the optical axis; therefore the object size remains unchanged. This is essential when you must measure objects that cannot be precisely positioned (e.g. on a conveyor belt).

Moreover, telecentric lenses eliminate any perspective error and are therefore perfect when thick objects must be measured.

Telecentric lenses also outperform standard lenses when it comes to distortion: An image is distorted when straight lines in the object space appear as curved lines in the image space. Distortion is measured as a percent deviation. Opto Engineering telecentric lenses feature incredibly low distortion, typically under 0.05 % and deliver extremely accurate geometrical information.

Special features of bi-telecentric

Bi-telecentric lenses are also telecentric on the detector side. This additionally guarantees:

  • Increased Field Depth
  • Even CCD illumination
  • Constant magnification even when the CCD is not perfectly positioned

Bi-telecentric lenses are able to deliver incredibly accurate measurement on many different precision parts.

Opto Engineering bi-telecentric lenses are specifically designed for real industrial applications. The lenses have a fixed design with no adjustable focus or aperture mechanisms to withstand vibrations and ensure accurate and consistent performance.

Characteristics of the Opto Engineering TCZR

Opto Engineering TCZR is a leading edge optical solution for imaging and measurement applications requiring both the flexibility of zoom lenses and the accuracy of fixed optics. By means of a very accurate mechanism, these lenses ensure unequaled magnification, focusing and image center stability when switching from a magnification to another, thus avoiding recalibration at any given time. 4 different magnifications, featuring a total range of 8x, can be selected either by means of the onboard control keyboard or via computer through a specific remote control software. Bi-telecentricity, high resolution and low distortion make these zooms able to perform the same measurement tasks as a fixed magnification telecentric lens.


  • Magnification 0.250x to 2.000x or 0.125x to 1.000x


  • Telecentric motorized zoom lens for 2/3"
  • Magnification steps: 0,125x - 0,250x - 0,5x - 1,0x and 0,25x - 0,50x - 1,0x - 2,0x
  • Working distance: 74 mm and 157,8 mm
  • Camera mount: C-mount
  • Aperture: F# 12 (fix iris)
  • MTF: @70lp/mm >35%
  • Length: 212 mm and 279,7 mm
  • Outer diameter: 56 mm and 99 mm
  • Includes USB cable in 2m length (USB mini to USB 2.0) and power cable in 0.60 m length to flying leads