Yes the 300/2.8mk2 from canon looks very good in the MTF lab and Hasselblads measurements
and much more importantly it works well when you use it to take real photographs.
Had a good time with mine today.
Do you use it with the 2x converter at times?
Also im close to ordering the 500 lens foot to put on the 300 for comfort!, i hope that it will fit....
Since the 500 comes with both a small and big foot , and the small one looks identical to the 300 foot I am kinda anticipating it will!
Will provide a bit more comfort for handholding with my hands
I've used the 2x TC with the EF 300mm f/2.8 L II, and the IQ is phenomenal. Even with the 2x TC, it is still one of the sharpest lenses on earth. Sharper than my 100-400mm at is BEST, by a long shot. Background blur is also dependent upon the ENTRANCE pupil, so even with a 2x TC, your background blur is effectively the same as an f/2.8 lens...so it is a fantastic combination. You really couldn't go wrong with it.
Thank you for this posting! I really needed to hear this from someone using the EF 300mm f/2.8 L II together with the 2x TC.
I was reminded that Bryan C in TDP maybe for first time admitted that the 2x TC III from Canon together with this lens was useable.
Of course that is based in the top-notch optical quality from the lens itself because we all know that all flaws and weaknesses from the lens that is in front of the TC will be also magnified.
Thank you jrista for all your postings!
Wish you a very good weekend!
All the Best!