Tamron 50-400 Di III VC VXD focusing problem w/ sony a6700
Hi all, I write in the hope to find a solution if anyone encountered the same problem. I have a rather new setup: a Sony a6700 (I'm new to Sony), and I just bought a Tamron 50-400 for a trip I am taking in a few days.
When trying the lens, I noticed immediately that it wasn't focusing, at all. I started playing around, updated the lens firmware (latest, v0.5), and made sure that the camera is on the latest firmware.
I also tried cleaning the contacts on both camera and lens.
Eventually, I managed to have it partially working. What happens for now is the following:
- when I switch on the camera with the lens on 50mm, the focus doesn't do anything: the autofocus doesn't engage and the manual focus doesn't do anything at all (the focus indicator moves on screen but it doesn't actually change anything)
- when I switch on the camera with the lens at ~100mm or more, the autofocus and manual focus work flawlessly on the whole range up to ~60mm, where it stops working again. If I go to manual with the lens at 60mm or lower I see the bar stuck on infinite, or moving very little from there and going back to infinite on its own).
Seldomly, the focus has worked on the full range when switching to AF-S mode from AF-C, but don't have a clear way to replicate it.
Given that this is brand new, I'm leaning towards a defective unit, but wanted to check if I'm missing something obvious before requesting a replacement.
Has anyone experienced this? Any ideas?
Thank you!