Sony a6600 vs Sony FX30

“That 200-600 is a solid lens. I use it too. But you're right to struggle, and it's not you. You're fighting the A6600's AF. It's just not as fast as the newer bodies for BIF. That's the honest reality. Two things to try: 1. That lens *needs* sunlight. At f/6.3, the AF hunts like crazy on dark days. 2. Don't use "Wide" focus. It's just guessing. Try **Tracking: Expand Spot**. Lock onto the bird *before* it moves. It gives the camera a fighting chance. And don't believe the hype you see online. My keeper rate is tiny. I'll shoot 300+ photos to get maybe 30 "keepers." That's just the grind.”

““…it is important to note that where the FX30 falls short – it’s the “stills mode” when compared to the FX3. Some features and functions are not provided with the new camera. There is no mechanical shutter, continuous still shooting, or uncompressed RAW. Also missing is the image sensor “anti-dust function” and AF illuminator. If you are into photography, you will find that the camera is not compatible with an external flash and NFC communication is not available.””