When was the ColorChecker chart created and by whom?

In the summer of 1976, three scientists at Macbeth, then part of Kollmorgen, published a paper called "A Colour-Rendition Chart." Lead author Dr. Calvin McCamy built the original 24-square chart.

What is the ColorChecker Digital SG?

The ColorChecker Digital SG expands the original chart for digital cameras and scanners, packing 140 patches onto one semi-gloss card, including the original 24 colours, a 17-step greyscale, and 14 dedicated skin-tone patches, on the same letter-size footprint as the Classic.

What sizes does the ColorChecker Classic come in?

ColorChecker Classic comes in five sizes: the Nano (about 24 by 40mm) for macro work, the Mini, the Classic studio standard, the XL for landscapes and large sets, and the Mega (roughly 1 by 1.5 meters) for use from a field or drone.

Calibrite | ColorChecker 50th | Timeline Page UK

Calibrite ColorChecker 50th anniversary timeline traces the ColorChecker chart from 1976 origins by Dr. Calvin McCamy at Macbeth through ownership changes (Kollmorgen, GretagMacbeth, X-Rite, Calibrite) to the 140-patch Digital SG, covering five sizes and company history.