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Sigma 105mm f2.8 EX Macro 1:1 Lens

05_105mmEX_1_
Review Date: Feb 20, 2006 Recommend? no | Price paid: Not Indicated | Rating: 7 

Pros: Good optical quality, small and light
Cons:
extending front element, hunts badly even by macro standards, screw on hood, general build quality, focus ring.

Bought this lens after reading the glowing reviews here. I have owned the Canon 100 USM Macro and I also currently have the EF-S 60 Macro. I sold the Canon 100 because I thought the 60 would be a better match on my 20D but found the lack of background compression from the shorter focal length less pleasing. So having already had the Canon 100 Macro I decided to give the Sigma 105 Macro a try.
I donít think itís a bad lens optically, though it is not as sharp as the EF-S 60 Macro (not many things are). Colors and contrast are fine.
What I did not like about the lens was the extending from element and the really bad AF hunting. Though I use MF much of the time, I do switch to AF quite often, even for macro shots. This thing is just horrible, even when compared to Canonís 60 and 100. Also, itís not only the hunting but the speed of AF even when it does find something to lock on to.
The screw on hood cannot be reversed in the bag and the focus ring is plain annoying. Itís like they tried to out think themselves when designing this thing.
I think that if you want good optical quality on a tight budget and can live with the hang-ups of this lens it will work just fine but for an extra $100 or so the Canon is at least as good optically (if not better) and a million times nicer to use with its ďfastĒ (by macro standards) AF, awesome build quality, internal focusing, nice feel and not to mention resale price if you decide to dump it down the road.