So help me here.
I'm trying to decide between a 5D MkII and a 7D.
My lens collection is decidedly biased towards EF-S.
I love the bokeh on my Sigma 30 mm f1.4 but miss the zoom.
I would like to know whether you can get equivalent (or better!) bokeh effect of let's say 50 mm f2.8 on the full frame sensor that you can get with the 30 mm f1.4 on an APS-C sensor.
In other words, if I get a full frame camera and an f2.8 zoom, I would like the bokeh effect to be as good as or better than I could get with the Sigma 30mm f1.4 on the APS-C sensor. Otherwise I'll just get the 7D and stick to my EF-S lenses.
If anyone has both types of DSLR and can post pictures to help compare, I would be grateful.
The pictures I would like are 50mm f2.8 on fullframe vs 30mm f1.4 on APS-C (Obviously you'd need to own the Sigma 30mm f1.4).