The Canon TS-E 135MM F/4.0L Macro is a tilt-shift lens in Canon EF mount with a maximum aperture of f/4 and a minimum focus distance of 49 cm. 

Tilt-shift lenses are commonly used in architecture and interior photography. The lens has a shift-change of +/- 12 mm to adjust your composition. To shift the focus, you can tilt +/- 10 degrees. To increase stability while photographing, you can use the tilt-lock mechanism. 

The lens weighs 1100 grams and uses 82mm filter thread. It is 88.5 x 139.1mm.