Sigma Zoom Firmware Problem

[Peter Plevritis]

Well I may have just screwed something up.
I upgraded my Sigma Zoom Lenses (18-35 f1.8 and 50-100 f1.8) to their latest firmware (2.0.1).
Now the 50-100 does not appear to be working on my MX camera (firmware 6.3.106). Aperture and focus control are no longer working on the Red - fine on DSLR though.
Sure, afterward I check and this is a known problem.
Unfortunately I can't seem to find a way to downgrade the lenses to the previous firmware.
Why oh why did I upgrade. I'm usually so good at not fixing what isn't broken.
Anyone run into this problem? Or know how to downgrade the lens firmware?

Pete

 

[James Poremba]

Hi Pete, I'm having the same issue - I thought about trying the newest beta on the epic-w, specifically states that it supports updated sigma 50-100 (firmware 2.0.1) but unfortunately, still did not solve the problem. If anyone else has any thoughts, please post them! The 18-35 still works fine.

 

[James Drake]

I saw another thread on this same topic, and realize this thread is 2 years old, but did you guys find a solution to get the 50-100 to work reliably?