imageswest wrote in post #18601921
Are you talking about the ancient, pre-IS 600mm f4L made back in the late 1980's? If so you might be correct.
I was referring to the first-generation 600mm f4L IS lens, which is one of Canon's sharpest telephotos.
In terms of how well the lens works on the Sony bodies, my comment was in response to someone who asked about the QUALITY of the images, which of course will be better on a camera with more resolution, better focus accuracy, and more dynamic range, all else being equal. I did NOT say anything about how fast the AF works with the adapter on a Sony body.
Nope, I was talking about Canon 600mm F4L IS, the first version. I had it for 3 times, none of them are sharp, compare to other super teles. I don't know what's your standard about sharpness, but my standards are 300mm F2.8L IS and 400mm 2.8L IS. I used to have 300mm f2.8L IS V1 and V2, and 400mm 2.8L IS V1. IMO, 300mm f.2.8L IS with 2X TC is on par with 600mm f4L IS and 400mm f2.8L IS with 1.4X TC destroys 600mm f4 IS V1.
Out of the super telephotos, 600mm is the least sharp lens. 500mm is sharper.
Again which Sony bodies are you referring to and against what? You're showing a video of someone using Sony a9, so I'd assume you're referring to Sony a9 body and it's fair to compare it to Canon 1dx2.
Better focus accuracy? Really? Sony a9 has better AF accuracy than Canon 1Dx2, especially pairing it with 600mm lens? I agree with more dynamic range, but 1dx2 is no slouch at all.