Steve is a committee member and editor of this website. His main photographic interests are art objects, architecture and architectural decoration, and macro.
Calibration images also to be found on the screen calibration page.
The top left panel was of the top-left image was produced by Photodisc, now owned by Getty Images, and has a freeware licence. (PDI Freeware licence) with additional components added by Steve. These calibration images can be freely used on a not for profit basis.