A new RF mount rumor and I won't hesitate to classify it under "good news"…
Sigma 105mm F/1.4 DG HSM ART lens images leaked
Images of the upcoming Sigma 105mm F/1.4 DG HSM ART lens leaked at Nokishita. This appears to be a massive lens. The Sigma 105mm F/1.4 DG HSM ART will have Canon, Nikon, Sigma, and Sony E mount versions.