MjMac
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Forum Member
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Posts: 77
Re: BIF with R5 and RF 100-500mm compared to A9II and FE 200-600 G
I have the R5 + RF 100-500. It's a great set up. The only draw backs are the 7.1 at 500mm and the 300mm requirement to use the extenders (you have to zoom the lens out to 300mm to attach the extender). I assume Canon did this to keep the overall size of the lens down. You get used to it, but there are definitely times with BIF when I have the 1.4 extender on and the bird comes in so close that it's impossible to keep it in the frame. Being able to zoom back passed 300mm would be nice in those situations.
I also have the A9 and 200-600. This is a good combo. I would say personally that the Canon R5 and RF 100-500 combo produces better images. The AF is great in the A9 and 200-600, but's it's even better with the R5 and 100-500. You do gain extra reach and the 2/3 stop difference you already mentioned when using the A9 and 200-600. But since I've purchased the R5 and 100-500 I don't use the Sony setup any more.
If you are considering the Alpha 1 and 200-600 that's an entirely different story. I do not have the Alpha 1, but I've seen it in action and the AF is every bit as good as the R5. The one issue I have heard is that the 200-600 doesn't have the resolving power to really take full advantage of the Alpha 1 sensor. I'm not sure if this is mostly anecdotal, or if there is data to back this claim up or not.
One other thing to consider is the 200-600 is a G lens, and not a GM lens, while the Canon is an L lens.