Get Canon 135mm f/4L at B&H Photo.
This scene is one that might confound without tilt; here I wanted to document the Saddlebag Lake Dam spillway by including structures near it, and the type of dam, etc. With a conventional lens, choosing the leading area would blur the background, and vice versa. Probably I could have used f/11 and done reasonably well, but here, by using tilt, a high grade and very sharp image is obtained near to far.
Also, I wanted natural perspective—no tilting the camera—so 10mm of shift was also used in addition to about 1° of tilt.
Includes images at sizes up to full camera resolution from f/4 through f/13, and crops also.
Note: color is off (too magenta), I re-shot a Macbeth chart for the Canon 5Ds R and determined +0M for Adobe Color.