Just a quick test this morning. My preliminary conclusion is that longitudinal chromatic aberrations (i.e., bokeh fringing) are a bit of a problem for this combo.
Test shots are with the 2-second self timer, camera resting on a bean bag, although not the most stable set up and you can see a bit of motion blur in one of the shots. My standard capture sharpening in RAW development, resized to 40%
[edit: i.e., these are 40% crops] and re-sharpened. f/4, ISO 125, 1/80 second.
The first shot is back focused, the second one in focus, and the third front focused. The green fringing in the third shot isn't as evident as the purple fringing in the first shot, but it is there.
Last edited by baro-nite; 11-22-2012 at 05:06 PM.
Reason: clarification