I borrow my friend’s Canon 1D Mk II for a while and trying out shooting bird with this camera. Gave Scarborough Bluffs a try to see if I can test the camera out. The auto focus is really good but being 1D has a 1.3 crop factor while my 10D has a 1.6 crop factor, I found I lose significant focal length, so much so that I started to use the 1.4x extender on my Sigma 100-300 all the time. But the problem with the 1.4x extender is that is slows down auto focus by a lot and it degrades picture quality. So in the end I think Canon 1D is not really for me. I would rather have a really good APS-C factored DSLR than a 1.3x crop factored camera.
Now here’s the result. First up a few common birds.
To the left Common Grackle and to the right American Robin.