Optically a lot superior.
Constant 2.8 aperture up-to 200mm focal length.
Sharp as a razor across the zoom range.
Superior bokeh.
Better build quality.
Faster AF (assuming you buy the AF-S version).
Performs much better on Full Frame.

Why choose an 80-200mm over an 18-200mm lens?
So I am modelling something for a friend. Its a cat from a game and it has some little bells on a collar.



I modelled and textured everything, and I was able to use Rigid Bodies for the bells so they move with the cat. But once I rigged the cat the rigid bodies don't follow the cat anymore

I attatched them using a Generic rigid body constraint with empties connecting the cat mesh to the bells. I also have strings connecting the cat to the bells using the Hook modifier, but I have been able to figure that out.

I just can't seem to find a way to make the rigid bodies follow the deformations of the rig.



Here is how I attached everything. The best that I have been able to get is the empties to follow the rig, but the rigid body simulations don't follow with the empties that are constraining them.


