I´m a bit scared of loosing my reputation of posting cat images, so here´s a recent one of The Local Lion
He´s 14 years old now, but still king of the street
Like with other animals, I find the structure and color of their fur to be amongst the best subject for lens tests there is. Open the link and look close around his eyes ...
I totally wrecked my 135 f2.0L earlier this year and was planning to buy a new, but ended up with a Zeiss 135 f2.0 instead. Optically and mechanically as good as only Zeiss makes them, but of course manual focus. This one is shot with the new Ec-S focusing screen. With that I am able to nail pretty much every shot, provided things does´t move too fast.
1/640s, f2.0, ISO100