Table Salt at 3x Magnification
Going beyond what normal macro lenses can do, the Canon MP-E 65 1-5x here shows what table salt look like at 3x magnifcation. 3x magnification means that the image is rendered 3x life size on the sensor - which means it is huge when displayed on a monitor.
As with the 1x salt picture, lighting for this shot is from a non-modified Canon 580EX II positioned just outside of the frame and remotely fired.
The salt was not so pure white - DPP's clone stamp tool was used to remove the brown spots.
Camera and Lens Settings
65mm f/8.0 1/160s ISO 100 5184 x 3456px