I had a chance to grab a few quick Bokeh tests on the Tamron 24-70mm f2.8. It isn’t nearly as beautiful as the primes i’m used to using, but it’s pretty good.  There is a little bit of onion pattern in the Bokeh and it does pinch off a little at the edges wide open. The shot above is wide open at f2.8.

Once you stop down a little bit to f4 and above the bokeh seems to round off a little more. However the onion effect still seems to be showing up a little bit on the left hand side. If you consider yourself a bokeh expert, I’d be interested to hear your opinion.

I’ve updated this post with Barnabil’s  recommendation to add a little more info to the shots. I’ll try and grab some 24mm shots later in the week and see how well they turn out.