Testing the Canon EF2XII Teleconverter

(Or, is it worth using at all?)

I have owned two of Canon's 2X teleconverters. Dissatisfaction with results in the field from both of these prompted me to do the tests presented on the following three web pages.

Appreciating that many will not, for whatever reason, carefully go through the images presented here, I offer the following, rather startling conclusion in summary:

Better results are obtained using the Canon EF1.4X teleconverter enlarged to 2X image scale in Adobe Photoshop with bicubic interpolation than through use of the EF2X II. Substantially better!

The detailed test series begins here.

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