The other thing about the C is the ergonomics are not quite as good as the other, later models, specifically the way you change shutter speeds and apertures. Instead of just turning the wheel, you have to push and hold a little chrome button behind the wheel to unlock the control. Also, you have to have the shutter uncocked before changing into or out of 1/500th of a second - there's a secondary, more powerful spring used to propel the shutter at high speed that must be engaged, and if you try to do this while the shutter is cocked, you risk damaging the mechanism. The plus side of the C is the aperture is much more round as it uses more blades (11 vs 7 or somesuch, I forget the exact number). This will give you smoother, more pleasing out-of-focus areas. One more quirk with the 2.8C is the plastic locks for the shutter button and the flash sync are very frequently broken, and there are no spare replacements available. This is minor in the grand scheme, but still.