What to upgrade next?

[EdHarrison]

I enjoy bird and wildlife photography. I currently own the Sony a1 combined with the 200-600 f/5.6-6.3. If I only had enough money to upgrade one which of the following should I get? The Sony a1ii or the 400-800mm?

 

[Unframed Dave]

600mm f4.

The A1 is a superb camera, and all you need.

The 200-600 is a superb lens, which in my view outperforms the 400-800.

I don't think the extra reach at the 800 end is worth much when you have 50mp worth of cropability. Especially given that you process your shots. The sacrifice in light is fine, if you're prepared to push the iso, I don't process, so I'm not.

Save your dollars and get the 600, then you'll notice a difference. While your saving get down to the gym, you need some core to lug it around.