New firmware for EF400mm F2.8L IS III USM & EF600mm F4L IS III USM is coming?

tq0cr5i

EOS T7i
Jun 17, 2012
67
0
37
China
New firmware for EF400mm F2.8L IS III USM & EF600mm F4L IS III USM is coming? Product Advisoriy has hit the canon.jp but 404 by now.

183495
 
Last edited:

Bundu

EOS T7i
Nov 24, 2014
70
27
South Africa
I hope it will fix sharpness issue with 2x extender. But then again I think it is the 2x extender that do not play well with the 400 iii.