This morning I went to Laratinga Wetlands in Mount Barker to catch up with a couple of friends, and also to try out the Canon RF1.4 Extender. The extender worked well with my RF 100-400 mm lens. The auto focus was slightly slower, and the focus a little softer, both of which are to be expected.
Here are some of the shots I took. Pacific Black Duck and Grey Teal are both common here
There was also a couple of very confiding Australian Spotted Crakes. I took plenty of photos of them along with some video.