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We went to the Canadian Rockies three summers ago. It is a beautiful place. Definitely head north from Banff to Lake Louise and Moraine Lake. Also be sure to check out Peyto Lake. I also highly...

Do not under estimate the Kenko TC's. The Teleplus Pro 300 1.4x performs very close to the Canon, and has the added benefit of working on more lenses.

As I stated in my first reply, I use a Kenko 1.4x TC with the 70-200 f/4 IS. Sharpness, color and focus speed/accuracy are all at least as good, if not better, than the 70-300 IS without a...

I upgraded from the 70-300 IS to the 70-200L f/4 IS recently. While the 70-300 is a fine lens for the price, the 70-200 is a much better lens in sharpness, color, and focusing speed/accuracy. When...

I have no experience with the Kenko 1.5x, but I do own the Kenko 1.4x Pro converter. You can make this teleconverter "non-reporting" to your camera by taping over the last three pins of the Kenko.
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I've owned the 70-300 IS for a couple of years, and recently upgraded to the 70-200 f/4L IS, which is very similar to the non-IS version (except for the image stabilization, of course :) ). You can...