Added more specs and photo.

Mostly the addition of a "II" at the end. :P

I'd hope that they the new one is sharper than the MK1. Gotta' wait for some samples to start floating around for review to find out.

I'm ok with mk1 as well and I don't see anything new with this one.

In addition to the new EOS 5D Mark IV DSLR, Canon is also introducing two EF-Series L-series lenses as well as a variety of EOS accessories. The new EF 16-35mm f/2.8L III USM Ultra-Wide Zoom Lens features a large diameter GMO dual surface aspherical lens and ground aspherical lens, f/2.8 aperture throughout the entire zoom range, fluorine coating, improved durability and is dust and water resistant. The new EF 24-105mm f/4L IS II USM Standard Zoom lens features an improved four-stop image stabilization as well as ghosting and flare reduction with air sphere coating. The Canon EF 16-35mm f/2.8L III USM Ultra-Wide Zoom Lens is scheduled to be available late in October for an estimated retail price of $2,199.00 and the EF 24-105mm f/4L IS II USM Standard Zoom Lens is scheduled to be available in late October for an estimated retail price of $1,099.00.

Optical Construction and MTF

Separate retail lens will be shipped only in December.

Review

Buyers of this lens should be happy with the improvements to the AF and stabilization systems, both of which should make it easier to obtain sharp, correctly-focused shots in a wide variety of situations.

http://www.photoreview.com.au/reviews/lenses/full-frame/canon-ef-24-105mm-f-4l-is-ii-usm-lens

Review

http://www.photozone.de/canon_eos_ff/995-canon24105f4ismk2

Samples

https://www.dpreview.com/samples/4604076757/got-focal-range-canon-24-105mm-f4l-ii-sample-gallery

Review

Sharpness at 24mm

Sharpness at 105mm

https://www.ephotozine.com/article/canon-ef-24-105mm-f-4-is-ii-usm-lens-review--30572

Issues notice

We have determined that some EF 24-105mm f/4L IS II USM lenses exhibit an AF operation-related malfunction. The details of the phenomenon and Canon’s service policy are described below.

We would like to offer our sincere apologies to users who have been inconvenienced by this issue. Going forward, we will spare no effort in our quality management to make sure our customers can use our products with confidence.

Phenomenon

At the wide-angle end, focus is not achieved properly when a peripheral AF points are selected, regardless of the AF area selection mode.

Affected Lenses

If the first two digits in the serial number (see the image below) of your lens are ”48”, ”49”, ”50” or ”51”, then your lens MAY POSSIBLY be affected.