Basically it goes like this:
It's an old design with a rather slow and unprecise ring motor, not a proper USM (focusing motor) like the more recent designs. USM-lenses focus faster, more precise and less noisy. The 50/1.4 motor is like a watch that moves the hand a whole second at a time, the modern USM motors are more like the Rolex watches which have smooth movement and can stop at any time. In some cases this means that the 50/1.4 misses the focus because of it's design. When shooting in low light the 50/1.4 can hunt quite a lot compared to the 85/1.8.
It's also a bit lacking in terms of contrast and doesn't sport the modern anti-reflective coating on the back lens which (for some reason) all modern lenses have.
It's not a bad lens, it could however do with an upgrade to MK 2 soon.
#6602667, By reflux The Photo Gallery
reflux 1,804 posts
Seen 11 months ago
Registered 13 years ago