Why are the lenses of my new ZED Mini different?

The ZED Mini received a rev2 upgrade in late 2022, with new lenses.

The original optics were no longer available on the market because of the material shortages of the COVID period, so we took this opportunity to improve the camera with a new lens offering better MTF (sharpness), a slightly wider field of view, and a better optical build. The result is a better image quality and a better depth map.

What is the impact on the software side?

For most users, the change is transparent: all cameras are factory-calibrated, and the calibration parameters of each camera are provided by the ZED SDK. The optical specifications are very similar to the previous version, except for the sharpness, which is 33% higher.

The only notable change concerns users who recalibrate the camera with external tools (for example, MATLAB or OpenCV): the ZED Mini rev2 requires a stereo fisheye calibration model instead of the Brown (radial-tangential) model, so your calibration code must be adapted accordingly.

To recalibrate the camera with the ZED SDK tools, see How do I recalibrate my ZED stereo camera?

ZED Mini rev2 parameters

• Focal length: 3.06 mm

• Aperture: f/2.0

• Field of view: 102° (H) x 57° (V) x 118° (D)

• Calibration model: fisheye

For the complete specifications, see the ZED Mini datasheet.