• UPDATE



    The forum will be moving to a new domain in the near future (canonrumorsforum.com). I have turned off "read-only", but I will only leave the two forum nodes you see active for the time being.

    I don't know at this time how quickly the change will happen, but that will move at a good pace I am sure.

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Your experience is needed, please:

Do you use the 2x extender III on the 600mm 4.0 IS II lens? How does the 2x extender affect the image quality.

I like to shoot small birds, that are often far away. For this, I recently use the 1.4x extender and the 7DII. But often, the cropped picture is to small in my opinion.
So I would suggest to buy an 2x extender and an 80D to get maximal focal length and AF performance. Later an 5DIV will follow....

Edit: 600mm L IS 4.0 II lens