1. high-quality materials, zero backlash, and, at long last, a metal mount.
2. somewhat crisper than the plastic version; this is owing to the Canon Super Spectra coating; nonetheless, the difference in sharpness is so subtle that it is difficult to perceive; however, the contrast in the backlight has risen.
3. At last, a rounded diaphragm composed of seven petals is placed, and the resulting bokeh will always have pleasing circular patterns.
4. stm motor, which, despite the fact that it buzzes like a robocop, still operates softly, and, most significantly, continuously hits the right position with only approximately 1-5% marriage. This is a significant advancement in the field.
5. Because yaw is not present, focusing is sped up, and the ability to focus on many objects inside a condensed space (the distance between them being one meter, for example) is accomplished more quickly than with a 50mm by 1.4 lens.
6. Finally, the hood mount was put directly on the body, as opposed to being installed on the trunk, which is another welcome change.
7. The minimum focusing distance has been lowered to 35 centimeters, which may not seem like much but is a welcome improvement.