What is Canon's ts lens?

TS stands for Tile/Shift, that is, the function of swinging and moving the axis. Tile can manually adjust the depth of field, and Shift can manually adjust the perspective distortion. At present, TS-E has five types and four focal segments: 17, 24, 45, 90, of which 24 has two generations. General17,24,45 is used for architectural photography, and 90 is used for product photography with the need of shifting axis (to be honest, it is not practical, and the shifting axis is too small). These are professional lenses (although 45 and 90 are not L, but the price is eight or nine thousand), and the imaging quality is good, but don't expect to be better than the displacement-free fixed-focus lens.

The main advantage is that they can shift the axis and swing only in the original large-format camera on the 135 camera, which makes the work of architectural photographers much easier. Amateur users rarely need to shift the lens, but creating by tiling and shifting is also a kind of gameplay. Finally, due to structural problems, none of these lenses can focus automatically.