Below is a calibration image copied from the PSNZ web site..

It contains a square in the center of the image so that those using widescreen displays can be sure that they have not got a distorted image.

Simple instructions for its use are:

• Adjust your brightness and contrast so that you see every step of the grey scale that has 5% increments. In particular, you should be able to see the difference between the 0% and 5% whites and the 95% and 100% blacks. Once you have achieved that you will have your tonal range correct.
• Now you can now adjust your colour settings so that no colour cast is shown on the image.

You can click on the image to open it at full size. You may need to maximise your browser window.

PSNZ Calibration Image