Quote Originally Posted by Joel Eade View Post
Impressive .... very close in image sharpness compared to the 300mm f/2.8L but I guess it should considering it has an elite price tag as well.

I agree that with the 2X converter there is a substantial drop in sharpness but with today's AI sharpening software it may not be a big deal.

Love to see some real world images with and without converters.
Here's a quick comparison, and I think the 100-300/2.8 + 2x holds up very well compared to the 600/4 II. The 100-500 is no slouch, either...

https://www.canonrumors.com/forum/th...-is-usm.42653/