Even if it sold at its $1,299 MSRP, the Samyang T-S 24mm F3.5 ED AS UMC lens would be an excellent value when compared with first-party lenses like the Nikon PC-E Nikkor 24mm f/3.5 ED ($2,199.95) and the Canon TS-E 24mm f/3.5L II ($1,899).
Wide-angle field of view; Full-frame coverage; Very affordable; Shift, tilt, and rotation adjustment
Some barrel distortion; Should be stopped down for best image quality; Flare can be an issue