A new RF mount rumor and I won't hesitate to classify it under "good news".…
Sigma 24-70mm f/2.8 OS ART lens coming soon? [CW3]
Rumor has it that Sigma may soon announce a 24-70mm f/2.8 OS Art lens, likely before CP+ (February 23, 2017). The lens is said to ship before summer. A pertinent patent was spotted in March 2016.
Stay tuned…[via Canon Rumors]