kin2son wrote in post #14368479
This onion bokeh is really holding me back from upgrading my 24-105. It's not acceptable TO ME. Either Tamron has to release a version 2 soon, or heavily discount this lens.
I think it's going to happen very soon, people will start returning their 'faulty' lens back to b&h and such, they don't have much choice.
I don't think there will be more than a small handful of such returns, and if they are they won't be because the lens is "faulty" because of the "bokeh".
You just have no idea how small an issue this is. I have taken about 400 photos with my Tamron 24-70 VC and only a couple shots have onion bokeh that is visible without zooming, and then it is only just barely visible unzoomed, and you wouldn't even notice if you weren't looking for it.
The only person you will show your photos too that will see it 99% of the time is you and a few highly anal-retentive people on these forums.
Check out this post below from the 24-70L Archive thread...
I had to go back (from end of thread towards start) through over 150 posts to find this gem. You can see a little onioning in the first shots bokeh in the upper left corner if you zoom in, as well as some weird ghosting of background out-of-focus details on that and some of the other photos. They reason I am pointing this out is to show you just how rare it is that you will take photos that end up showing these kinds of weaknesses. The 150+ posts I looked at before that didn't include any photos that really had circular bokeh, and none large enough to potentially see this kind of issue in without zooming until this one. The same rareness should happen with the Tamron, perhaps not quite as rarely since the issue is more pronounced, but still it should be rare enough to not worry about it much.
How about this shot...
No onioning in the bokeh, but the bokeh at just F/4 is already going octagonal instead of round. The Tamron should have almost circular bokeh through f/5.6 (will look less circular when zoomed in to max of course).. Another tradeoff to be made along with VC vs. no VC, but again not something you will need to worry about 99% of the time with the Canon, let alone the Tamron.