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Opto Engineering TC4MHR056-C

Opto Engineering Lens

Product Family


Part Number




Sensor Size

16.8 mm

Lens Type


Focal Length

257.1 mm

Salient Features

Opto Engineering TC4MHR Series:  TC4MHR056-C , C Mount, 16.8 mm Sensor

TC4MHR lenses cover up to 21.7 mm detector diagonal (e.g. suitable for 1.2? detectors), making them the perfect choice for advanced metrology applications.

The re-designed TC2MHR-TC4MHR series outperforms the previous version featuring unmatched resolution, low distortion and homogeneous image quality while offering the best performance to price ratio.

TC2MHR-TC4MHR feature a compact and robust design that allows easy integration in industrial environments and additionally feature phase adjustment by simply loosening the set screws positioned in the eyepiece part.


Optical specifications
Magnification (x) 0.228
Image circle Ø (mm) 16.8
Working distance (1) (mm) 157.8
wF/# (2) 16
Telecentricity typical (max) (3) (deg) <0.04 (0.08)
Distortion typical (max) (4) (%) <0.05 (0.10)
Field depth (5) (mm) 23.1
CTF@ 50 lp/mm (%) > 40
Object field of view 8 (mm x mm or Ø)
with IMX174/IMX249 13.3 mm diag w x h 11.35 x 7.13 49.76 x 31.25
with IMX255/IMX267 16.1 mm diag w x h 14.19 x 7.51 62.24 x 32.94
with IMX253/IMX304 17.6 mm diag w x h 14.16 x 10.37 Ø = 45.49
with IMX387 21.7 mm diag w x h 18.9 x 10.6 Ø = 46.67
Mechanical specifications
Mount C
Phase adjustment (9) Yes
Length (6) (mm) 257.1
Diameter (mm) 80
Mass (g) 979

Last update: 2021-06-22

REACH compliant RoHS compliant, Directive 2011/65 EC


  1. Working distance: distance between the front end of the mechanics and the object. Set this distance within +/- 3% of the nominal value for maximum resolution and minimum distortion.
  2. Working F-number (wF/#): the real F-number of a lens when used as a macro. Lenses with smaller apertures can be supplied on request.
  3. Maximum slope of chief rays inside the lens: when converted to milliradians, it gives the maximum measurement error for any millimeter of object displacement. Typical (average production) values and maximum (guaranteed) values are listed.
  4. Percent deviation of the real image compared to an ideal, undistorted image: typical (average production) values and maximum (guaranteed) values are listed.
  5. At the borders of the field depth the image can be still used for measurement but, to get a perfectly sharp image, only half of the nominal field depth should be considered. Pixel size used for calculation is 5 μm.
  6. Measured from the front end of the mechanics to the camera flange.
  7. With KAI-08050 (22.6 mm diagonal) detectors, the FOV of TC4MHRyyy-x lenses may show some vignetting at the image corners.
  8. For the fields with the indication “Ø =”, the image of a circular object of such diameter is fully inscribed into the detector.


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