As a tilt-shift lens option, Samyang offers a very economic opportunity with optimal quality for all photographers to taste tilt-shift experience. Unless users go "pixel-peeping", the quality is nice and sufficient. The ideal aperture is f/8 for best sharpness.
1; Very economic opportunity to use tilt-shift lens, 2; Nice build quality but one "tick" lower grade than Canon, 3; Nice aperture control ring, 4; Nice resolution when not tilted, not shifted; 5; Light-weight and sturdy
1. Lock switches release lock completely when you turn them a bit 2. Tilted and shifted images have lower resolution at the edges 3. Focus ring is very easy to rotate; not well damped