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  Reviews by: Greg Futral  

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Canon EF 180mm f/3.5L Macro USM

ef_180_35_1_
Review Date: Jun 24, 2008 Recommend? no | Price paid: Not Indicated | Rating: 4 

 
Pros: Seemed sturdy
Cons:
My copy was soft at F16

The camera shop I bought was kind enough to let me trade down to a 100 2.8, which I have been quite happy with. It is sharp at f11, and is easier to manage.

 
Canon Extender EF 2x II

Extender_2x2_1_
Review Date: Jul 7, 2006 Recommend? no | Price paid: Not Indicated | Rating: 1 

 
Pros: Questionable
Cons:
Loss of Sharpness with the 600 F4 IS.

I had borrowed the Canon 2X, took a picture of an immature eagle in a tree. I did the same with a 1.4 teleconverter, and found that the image was significantly better with the 1.4. This was evident by looking at both the images at the same size. I think this may hold true with other lenses besides the 600 F4 IS. I think you are better off by using a 1.4 and enlarging the photo.