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Canon EF 70-300mm f/4-5.6L IS USM

70-300mm
Review Date: Feb 21, 2011 Recommend? | Price paid: Not Indicated

 
Pros:
Cons:

Just to add to the previous post, this behaviour of aperture in Program mode happened when using Auto ISO.

 
Canon EF 70-300mm f/4-5.6L IS USM

70-300mm
Review Date: Feb 17, 2011 Recommend? no | Price paid: Not Indicated | Rating: 7 

 
Pros: build quality, size
Cons:
soft at 300mm (much better at 200mm)

Perhaps I had a malfunctioning unit, but the lens was soft at 300mm. Way too soft for an L lens of this price. There appeared to be significant improvement at 200mm, but in a lens like this the 200-300mm performance should be good.

There is this one thing to note about the lens though - at least on a 7D, the camera *always* selects an aperture of (at least) f/7.1 when using program mode at 300mm. Even if one pushes the ISO up to 3200. 70-200 f4 and f2.8 IS:s that I've shot with always select the largest aperture (f4 or f2.8 at 200mm) in program mode. So, that would suggest that canon considers wide open performance at 300mm sub par. So no, I didn't warm up to the 70-300L, there was no "wow" factor at all for me. I was on the verge of giving a 6 for overal rating (for this unit at least), because of the price/performance ratio.
 
Canon EF 70-300mm f/4-5.6L IS USM

70-300mm
Review Date: Jan 19, 2011 Recommend? yes | Price paid: Not Indicated

 
Pros:
Cons:

I haven't shot with this lens enough yet to form a rating, but I have to step in to comment about the previous review. If the user finds the 55-250 EF-S to be sharper than the 70-200 f/4 L IS and the 70-300L, well... There is simply something wrong there.