The calibration slide Levenhuk 1 is designed for use with stereoscopes. It is made of optical glass, has a diameter of 24 mm, and the scale it carries has 200 subdivisions spaced 0.1 mm apart.

A calibration slide with a scale is essential for improving measurement accuracy when using image analysis software on a computer. Its purpose is to determine the correction factor that the software will use for the selected objective lens.

Instructions for use:

• Attach the calibration slide to the microscope's stage.
• Rotate the nosepiece to select the objective lens.
• Take a photograph of the scale (with the maximum possible resolution).
• In your image analysis software, select “Calibration”. Use the computer mouse to indicate the maximum visible distance, then enter the real-world value.
• Enter the name of the calibration and check the values.
• If the procedure is done correctly, the software will save the correction factor in its memory and will adjust measurements accordingly.