Dustin Abbott has completed his extensive review of the Canon EF 70-200mm f/4L IS II. You can check the video above, or read the entire review here.
It seems like most reviewers, Dustin discovered that the updates are for the most part incremental, and not a revolutionary step forward. However, the sum of the incremental updates make the EF 70-200mm f/4L IS II a worthy upgrade for most shooters if you're using the non-IS or first IS version of this lens.
Some have questioned whether this lens is a worthy upgrade, if enough has changed. If you are looking for a revolutionary improvement over the previous generation lens (perhaps considering updating), that might be a hard choice, but there is no doubt that this is a significantly improved lens on a number of levels. The build is improved, the autofocus is improved, and the image quality is improved. There is no single thing that jumps out at you, but the sum total of the improvements add up to what I believe is the best f/4 lens that covers this focal length. Read the full review
The Canon EF 70-200mm f/2.8L IS III is scheduled to begin shipping this month, and it will be interesting to see how the “minor” updates in this new lens are going to be received. We're hoping some of the updates in Canon's manufacturing technology will be passed onto this lens to help with copy variation and optical quality performance.