Hard to say given the difference in exposure, and having only screen resolution images to work with. Plus with only a single sample, and of a scene where focus is so critical, and there is nothing else in the scene to compare, it's really hard to say for sure if either is focused *perfectly*.
From what I do see, I'm going to put this in the category of a difference perhaps too small to matter. Which is to say, if it costs $300 to get results that are not noticeably better than cropping when viewed at screen resolution, I'm not going to be in a hurry to get one. For some reason, I never really considered this particular TC when thinking about longish telephoto options - seemed expensive for a TC. If it plus my M200/4 could beat a good a decent 400mm lens or 500mm mirror lens handily, it could be worth considering. But I'd need to see more evidence than this!
Last edited by Marc Sabatella; 06-03-2009 at 02:34 PM.