10 out of 10 points and recommendedbuilt quality, image quality, splendid ISnone for me
I bought this lens as standard lens on my 40D. An I wasn't disappointed. It is simply great. The IS is perfect and it really helps as F4 isn't really that wide. But managing times around 1/8 with 105 mm, that is really great for me.reviewed October 14th, 2008 (purchased for $1,000)
I didn't do any lab tests, but in real life, I don't see any annoying distortions. Some CA but not critical, and the sharpness is overall very very good. At long end, wide open is a point softer than before, but it remains still excellent. My second L lens and not my last.
9 out of 10 points and recommendedoutstanding image quality, very good built quality, nice handlingmy lens is front focussing..
I have it now for some years in my bag, and I have to say that I'm always pleased to see its performance. For the moment, I'm experimenting with this lens and a 2.0x converter from Sigma. Thanks to the great sharpness of this lens, even wide open, you can almost use the 2.0x tc wide open.reviewed May 8th, 2009
The only weak point on my lens, is its front focussing. It is not much, but in tele use, you will not be right on the point you wanted to focus.. The speed of the AF is for me ok. You have to keep in mind, that it moves heavy glass through a long way, as every macro lens.
A long macro, with a decent range, exceptionnal image quality and a very attractive price tag.