The Canon TS-E90mm f/2.8 is a tilt-shift, telephoto prime lens. The TS-E90mm f/2.8 provides three degrees of freedom, allowing the user to shift, tilt or rotate the lens. Shifting the lens provides analog correction of perspectives on the image, allowing images taken with an upward angle to have parallel vertical lines. This is particularly useful for architecture and product photography. Tilting it allows selective depth of field.