Originally Posted by M_Six
I tossed the Kenko 2x converter on it and took a shot of some leaves outside. This is a 100% crop from the center of the image. Not tack sharp, but not bad for a cheapo converter. I wonder how much better IQ the Canon converter would yield.
Mark, no offense, but I'd call that unuseable. Is that with your new lens? Was that MF with the view at 10x? With a 2X converter you've probably got really slow AF and it might not have caught up OR you need to set your camera's front/rear focus with a +- adjustment. I think your camera allows for AF fine tuning, including with a TC combination (so long as the camera recognizes your TC). If the camera doesn't recognize your Kenko, it'd be one reason to go with a Canon brand TC.