Testing out my new 400 5.6L yesterday and I was blessed with 2 nuthatches hanging out together. One was apparently grabbing food from my feeder and bringing it back to the other one. Images are resized.
Just tickle that 400 with a 1.4x TC and you might be well pleased too. Amazing how short a 400 can be at times, especially FF. Those nuthatches are fun, colorful and not often much of a stationary subject. Have fun with that lens!
I know you will have fun with that lens, I sure do. Those nuthatches can be difficult to capture, as Karl said they don't stay in one place to long. Congrats on the new toy!!
Shot with my MkII and processed via DPP and then resized in Image Sizer. Yes, they can be quite quick, but they are getting used to my backyard so hopefully I can get closer.