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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Sigma 50-100 and 85mm not working again on build 7.2

The quick fix is to do the following: mount the lens. Wait 3 seconds. Unlock the lens, push the eject button, rotate the lens about 10 degrees. Wait 3 seconds. return the lens back to its locked position with a little speed. You want to slightly jolt it into place but not slam it. Just slightly harder than normal. Your lens will come back to life, every single time. I have become so used to it I just do it second nature with the 50-100. But it works, every single time. Don't waste time cleaning contacts or anything. It isn't the issue. It is is some kind of "wakeup" that isn't happening.
 
Anyone have any updates on this? or do we know of a way to roll back the firmware in the lens itself to v 1.x?
 
Hey Eric,

It depends on which lens you mean. The 85mm ( FW1.02 ) and 50-100 (FW 2.02) kind of work again sinds sigmas last update on these two lenses.
Sometimes you have to disconnect and connect again from the mount but that sort of solves the problem.

However, here is a way to roll back, but that involves shipping it back.
I contacted Sigma and they told me I could send the lens in and they will roll back to the FW I tell them.
It was arround 70euro with shipping.


Since I use the 100mm very rarely and have the 85mm aswell I think I swap out my 50-100 for the 50 1.4.
That lens seems to work like the 24-35 without issuses and has not that much breathing.
 
Matthew Rodriguez said:
Ok,

I am not sure if this will be a solution to everyone, but this seemed to work for my Sigma Art 50-100mm EF lens on my RED Epic-W Helium:

When I mount the Sigma lens onto my camera, I would get no communication between the lens and camera. I then would twist on and twist back the lens onto the mount, but to no avail.

So I decided to HOLD DOWN the RELEASE BUTTON on the lens mount while I twisted the lens into the mount. Once the lens was fully twisted in, I released the RELEASE BUTTON on the lens mount, and slightly twisted the lens counter-clockwise (like as if you were removing the lens from the mount), and the lens would "click" into the mount. All of a sudden, the lens made internal noises and was connected to the camera. I had control of the aperture and everything. This has been working for me so far. I'm not sure if this is the be all end all answer to everyones problem, but I hope it might work for everyone! :)
Click to expand...

This legit worked for me, stupid workaround but I'm glad I can actually use my Sigmas now.
 
Alexander_Klose said:
Hey Eric,

It depends on which lens you mean. The 85mm ( FW1.02 ) and 50-100 (FW 2.02) kind of work again sinds sigmas last update on these two lenses.
Sometimes you have to disconnect and connect again from the mount but that sort of solves the problem.

However, here is a way to roll back, but that involves shipping it back.
I contacted Sigma and they told me I could send the lens in and they will roll back to the FW I tell them.
It was arround 70euro with shipping.


Since I use the 100mm very rarely and have the 85mm aswell I think I swap out my 50-100 for the 50 1.4.
That lens seems to work like the 24-35 without issuses and has not that much breathing.
Click to expand...

Hey Alex, did you end up keeping your 50-100? Did you get the firmware to a point where it was working well with your Red? I have the 18-35 which works fine, but the 50-100 is spotty. Like you said, talking with Sigma they stated that the firmware was "too new" on the 50-100, but I'm not sure what older firmware should be on the 50-100 to get reliable performance?

Thanks!
 
Hello James,
a bit late but I just saw your post. Yes I still have it and also use it. Haven´t used it much on the Helium recently only on Pocket 6k cams for live events. Since the last firmware update of the 50-100 and 85mm Sigma art it seems that the lenses work better on Red. Still have to do the trick with twisting some times but it got a lot better. Performence was never really reliable and if I was shooting more on the sigma zooms I´d probably go for the cine version. Thats the most reliable thing to do to be honest. Or use the last firmware and trust in the universe ;) Works quiet good for me in the end.
 
I have an easy solution. Mount the Sigma 50-100mm as usual. At first it displays N/A… then flick the focus switch on the lens from M to AF. Aim the camera at a bright subject and wait a few seconds for the lens to find focus and the iris will engage. Flick the lens back to manual focus and you’re good to go. This is working for me 100% of the time with a Nikon mount on my Epic-M Dragon and Epic-X Dragon… the same trick is also working for older Nikon lenses which are not officially listed as supported on Red.com (Nikon 80-200mm, Nikon 24-120mm and Nikon 60mm macro)
 
Last edited:
M. Windon said:
I have an easy solution. Mount the Sigma 50-100mm as usual. At first it displays N/A… then flick the focus switch on the lens from M to AF. Aim the camera at a bright subject and wait a few seconds for the lens to find focus and the iris will engage. Flick the lens back to manual focus and you’re good to go. This is working for me 100% of the time with a Nikon mount on my Epic-M Dragon and Epic-X Dragon… the same trick is also working for older Nikon lenses which are not officially listed as supported on Red.com (Nikon 80-200mm, Nikon 24-120mm and Nikon 60mm macro)
Click to expand...

Thanks for the tip. Just sold my Helium but will try that on Komodo now and on Raptor soon.
 
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