I have the previous (non Art) version of the Sigma 85 f1.4. It worked fine with my 5D2 and 5D3. I just tried out my new 5D4 and discovered a horrific artifact when the lens is used at 1.4 or 1.6 or 1.8. It creates these huge dark circles, like the Target store logo (in gray instead of red). At f2 and smaller it goes away.
Since it is a non-Canon lens (and does not have the USB connection of the newer lenses) I assume there is no fix? Has anyone experienced it with this or other Sigma lenses? If there is a fix I would love to know. However I have learned my lesson about third party lenses and will only use Canon lenses from now on. (My other three lenses are Canon L).
Since it is a non-Canon lens (and does not have the USB connection of the newer lenses) I assume there is no fix? Has anyone experienced it with this or other Sigma lenses? If there is a fix I would love to know. However I have learned my lesson about third party lenses and will only use Canon lenses from now on. (My other three lenses are Canon L).