Hello
These are my cat shots with the 1.8 85 mm at f 1.8. They were made to try out my new mark III at 6400 ISO in a poorly lit part of our living room with energy saving bulbs. The camera focuses very precisely on any of the selectable focus points, indeed, much better than my 20D. The potential of the 1.8 85 mm comes out much better now. Hope you like the results.
Here is another brown tiger. She is 17 years old in this picture, lit by one 18 W fluorescent tube and exposed at f/1.2, 1/60 s and ISO 1600. Depth of focus at f/1.2 is not large enough to contain the eyes and the forehead simultaneously. http://img170.imageshack.us/img170/8380/webrosaf1260s8241sx9.jpg