Does the CZ 16-80 vignette with filters?

Just as an update, I ended up picking up a mint second hand copy of the 16-80. I intend to keep (for now!) my Tamron 17-50 and do a reasonably scientific comparison between them of real world corner sharpness and post up the images here, so if anyone has any tips for this please let me know!

The lens came with a very thick UV filter which didn't cause vignetting that I could detect so this has allayed my fears a little.