Dan.
I have the Canon 10D, 20D and 50D and I recently bought the 5D Mark II, I also have and use several of the L series telephoto lens. I have the tele-extender you purchased and it works great as long as you have enough light or you can live with a higher ISO in low light. As you extend the "length" of the lens, you also effectively negatively impact your aperture.
My option is the tele-extender works very well in most cases. You will lose a bit of definition on the outer edges, but that often can be cropped out.
With the 60D you are already getting a 1.6 multiplier on the focal length of your lenses compared to full frame digital or 35mm film, so with the 2x you are getting a big boost on your telephoto lenses at the small cost of definition.
Have fun with it and most importantly shoot some RAW stuff and get into digital darkroom instead of just shooting .jpgs Think of the RAW image as a negative and work with it. Time consuming, but inexpensive fun during the winter.
R2B
Last edited by Resident 2B; 12-02-2012 at 10:32 PM.
Reason: Fixed spelling and other errors. I did not have my glasses when I posted.
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