ICVFXTOOLSSensor & Lens Configuration
Enter your camera's sensor dimensions and the lens's marked focal length. These are used to compute the estimated real focal length in millimetres from the calibrated pixel focal lengths.
Full frame = 36 mm | S35 = 24.89 mm
The marked / stated focal length on the lens barrel
Stored with results saved to Library
FL quick-set
Quick presets
Calibration Pattern
Configure the printed calibration target you will photograph. Checkerboard is the most reliable and widely supported option.
Don't have a checkerboard pattern? Generate one free with our
Calibration Grid Tool
Number of internal corner intersections horizontally
Number of internal corner intersections vertically
Physical size of each square on the printed/displayed target
Capture guidelines for reliable calibration
- Use 10-24 images (more is better, diminishing returns above 24)
- Cover all four corners and the centre of the frame across your set
- Tilt the board +/-30 degrees in X, Y, and Z axes between shots
- Keep the board flat - mount on rigid aluminium or foam board
- Avoid motion blur, focus the board sharply, use consistent exposure
- Shoot at your working aperture (not wide-open, not diffraction-limited)
Live Preview
10 x 7 squares | 9 x 6 inner cornersThese dots mark the inner corner intersections OpenCV detects
Calibration Images
Upload your calibration image set. Images are sent securely to the LensLab compute server and deleted immediately after processing - nothing is stored.
Off: upload one image set, pick multiple solvers in Step 4 to compare. On: upload one image set per focal length / focus distance, all solved with a single shared solver. Produces a multi-row .ulens for zoom & focus-breathing curves.
Drop images here
or
JPG · PNG · TIFF · BMP · WEBP
Solver for all positions
Each position needs at least 10 images. Set the focal length and focus distance for each position. Use ∞ for infinity focus. After calibration you can export a multi-position .ulens file.