Canon Gets 300mm Creative

[Ozarker]

Well, for me, 300mm wouldn't be long enough. 420mm is too short for me too. (Aspc x 1.6? Can't remember.)

I had the EF 400mm f/5.6L on a 70D. I really liked that lens. Unfortunately, it just seemed too short for birding in the area I lived at the time (Mojave Desert). I had a Canon 2x, but the lens just wasn't sharp with that on there.

If I needed a birding lens and was going to drop $11k, I'd save a little more for something with more reach. Yes, I know there are more uses.

 

[P-visie]

It's better than you think. I used to shoot the RF 300mm f/2.8 II with the 2xTCIII and found it excellent. It stands up well, even on Craig's dishonourable 5DSR vs the RF 600mm f4 on the R5. I'm jealous of the Sony 300/2.8 as it gives a very sharp and light 600/5.6.

https://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=739&Camera=979&Sample=0&FLI=2&API=2&LensComp=1556&CameraComp=1508&SampleComp=0&FLIComp=0&APIComp=0

https://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1679&Camera=1538&Sample=0&FLI=2&API=0&LensComp=1556&CameraComp=1508&SampleComp=0&FLIComp=0&APIComp=0

I did not say it was bad, I stated that the image quality and AF speed would no be a good as a 600 mm f4 lens. The comparisons you posted confirm that, specially for the Sony 300mm.