Typically, IBM compatibles have not provided any mechanism to control how brightly the midrange colours are rendered, thus a typical PC's gamma is said to be uncorrected. Uncorrected computer monitors commonly have a gamma in the region between 2.0 to 2.6.

Macintosh computers have for many years allowed the user to control the gamma of their display. Most Mac systems have a gamma of 1.8 or thereabouts.

The images on this site have been standardised to an approximate gamma of 2.0. This should result in the images looking okay on most computers, although on some PCs the images may appear a little gloomy and on some Macintosh computers they may appear a little washed out.

If you wish to attempt some fine tuning on your system:

Mac users: Switch the monitor to uncorrected gamma if the images are too light (use the "Monitors" control panel or the "Monitors and Sound" control panel application, if your computer has it), or to a setting closer to 2.0.

PC users: Try adjusting the brightness and contrast controls on your monitor if the images appear too dark.