Print this at the native resolution of the image- 75mm x 75mm print size.

See how far away you can stand while still resolving the 24LPPI line bars (circled in red).

For basic calibration (lens resolution, etc) place this image at a distance equal to 1 inch per millimeter of focal length. For example, 50" for a 50mm lens, or 100" for a 100mm lens. That is the distance to the focal plane mark on the camera body, not the end of the lens.