Get Canon 135mm f/4L at B&H Photo.
This series was shot at maximum rise (upward shift). I wanted to verify that on a finely detailed subject that detail would hold up even at the far edge of the image circle (top of frame).
The Breakthrough Photography X4 magnetic filter was used for this shot. It transmits outstanding color, as can be seen.
Includes images at sizes up to full camera resolution from f/4 through f/13, and crops also.