You asked

What are the alternatives to the canon ts e 17mm f 4l?

Here is what the site says about that.

From Canon TS-E 17mm f/4L: Canon TS-E 17mm f/4L: A prime lens by Canon for Full frame cameras, 17mm f/4. A tilt-shift lens for architecture and interiors, manual focus. Specs - Maker: Canon - Focal length: 17mm (prime) - Maximum aperture: f/4 - Made for: Full frame sensors - Mounts: Canon EF - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Canon EF): as marked, 17mm. - On APS-C (Canon) (Canon EF): ...

From Sensor sizes: The main sizes: - Full frame (36 x 24mm, the size of a 35mm film frame). The reference size: when people quote a focal length "in full-frame terms", this is what they mean. - APS-C (about 23 x 15mm). Crop factor about 1.5x (1.6x on Canon). Most entry and mid-range mirrorless cameras. - Micro Four Thirds (about 17 x 13mm). Crop factor 2x. Small, light systems from OM System and Panasonic. - 1-inch ...

Quoted from this site's pages.

From these pages