- Posts: 18
- Joined: Mon Oct 16, 2017 11:55 am
Hi all
I've seen my issue around on the forums but the OP's never seem to find a solution. Just wondering if there is any new light on this issue?
I purchased a Sigma art 18-35 1.8 new in May 2018. Love it... but it doesnt seem to want to work properly on my UM46. The iris can be set upon turning on the camera but randomly after a few moments either the aperature index number disappears or 'jumps' causing the aperture to open or close (ruining a shot). Sometimes the aperture stays set and the index jumps to f10 (without physically changing) when I try to adjust it, it just comes up with an abritary range of 10-32 (the lens supports 1.8-16). its kinda unusable like this, professionally at least.
I've tried factory resetting the camera - this seems to work for a bit then it goes back to playing up.
It was recommended that I buy the Sigma USB dock to update the lens' firmware, but since I purchased it in May 2018 I would imagine this to be up to date. The URSA is on the latest firmware too (4.8?) So I doubt the firmware is the issue, esp when others seem to have been using this combination flawlessly since 2016.
I've tested the lens on a canon 550d and a sony a3600 - both older than my URSA - and it works flawlessly.
I have been using the Tom Antos-style cfast to SSD setup and this recently has been randomly dropping frames and freezing my camera too. I think its a long shot but could there be some correlation between SSD faults and the iris?
Thanks for listening!
I've seen my issue around on the forums but the OP's never seem to find a solution. Just wondering if there is any new light on this issue?
I purchased a Sigma art 18-35 1.8 new in May 2018. Love it... but it doesnt seem to want to work properly on my UM46. The iris can be set upon turning on the camera but randomly after a few moments either the aperature index number disappears or 'jumps' causing the aperture to open or close (ruining a shot). Sometimes the aperture stays set and the index jumps to f10 (without physically changing) when I try to adjust it, it just comes up with an abritary range of 10-32 (the lens supports 1.8-16). its kinda unusable like this, professionally at least.
I've tried factory resetting the camera - this seems to work for a bit then it goes back to playing up.
It was recommended that I buy the Sigma USB dock to update the lens' firmware, but since I purchased it in May 2018 I would imagine this to be up to date. The URSA is on the latest firmware too (4.8?) So I doubt the firmware is the issue, esp when others seem to have been using this combination flawlessly since 2016.
I've tested the lens on a canon 550d and a sony a3600 - both older than my URSA - and it works flawlessly.
I have been using the Tom Antos-style cfast to SSD setup and this recently has been randomly dropping frames and freezing my camera too. I think its a long shot but could there be some correlation between SSD faults and the iris?
Thanks for listening!