Patrick Murphy-Racey on Shooting the Sony A9 with the FE400mm f/2.8GM at the US Open
From the Patrick Murphy-Racey YouTube Channel:
I spent two days at the US Open shooting the Sony A9 with the new Sony FE400mm f/2.8GM lens that is due to ship at the end of September of 2018. I used wide area AF as well as face detection. After almost 30 years shooting sports as a pro, it was fantastic to not worry about the AF grabbing the net all the time. I was free to compose on the fly and use the entire sensor area. It was a "joystick-free zone" that netted me a some nice images. Many thanks to my son Patrick Daniel for helping me out with explaining "face-detect AF." Settings, for you geeks out there: Manual exposure, f/2.8 always in every situation, I try not to drop below 1/2500th shutter speed so as to try to stop the action but 1/4000th is where things really look good. Wide Area AF, Face Detect On, back button AF on AF-ON button, I shot sometimes with the 1.4x TC if the player was really far away, but I also used the APS-C function to "punch in" to 1.5X with no light loss. My AF sensitivity is always set to 5.