Still a good chance to test the limits of the a7r4, these speedsters really motor along. Using the mechanical shutter to get a good freeze at 61 mp is the critical setting for the a7r4.
I am happy with the dynamic range, and high iso resolution with this camera, and the 100-400 seems to be a good fit for my budget. The 600 f4 is just a bit out of range!
thanks for looking!
Male Long-tailed duck in Flight
Sony Alpha α7R IV ,Sony 100-400GM
1/2000s f/5.6 at 400.0mm iso1250