Summary: This is a fantastic pro lens and for the price it's great value for money. Using it on a DX (cropped) sensor it is extremely sharp and produces great results with no chromatic aberration that I've noticed so far also with very little barrel distortion. I would highly recommend it as a first pro lens and cheaper 70-200mm alternative. The lack of optical stabilisation isn't a great hindrance unless shooting in low light but a steady hand goes a long way.
Summary: I looked at several 2.8 lenses in the 70-200 range and ruled out the Nikon straight away , Purely because of financial reasons . The Nikon costs about £1600 but my budget wouldn't stretch that far. I read all the reviews I could find on line between the Tamron/Tokina/Sigma and I very quickly decided it had to be the Sigma but which one ?
Sigma 70-200mm f2.8 APO EX DG Macro II Lens For Nikon
1 January 2012
Summary: This lens is stunning. I've had it for a few days now and have tested it across an urban environment and am well satisfied with it. Many others give a detailed breakdown of performance, from my perspective I've never felt happier with a lens. It 'feels' right in the hand - some might say heavy - I'd prefer robust and well constructed. I'm an amateur with several published photos and it's more than adequate for the quality that I need.
Summary: I had my doubts about this lens as I'd never had a 3rd party lens before and there are many different models of this lens which have all had very different performance characteristics. I can safely say that this lens has a very nice feature set and performs excellently outclassing the competition all the way up to the much more expensive 1st party options. Handling: This lens feels and looks great. The focus ring is excellent and large with a smooth motion.
Summary: I have owned this lens for about 9 months now. Overall I am very pleased with it. Build quality is very good with a solid well made robust lens body. Image quality it pin sharp, I have got 3 customer images loaded on this page. As yet I have no negative things to say about it. It has been used in several non camera friendly situations and has yet has been 100% reliable.
Summary: I photograph bands, among other things, in often dark and badly lit pubs and where the difference between focussing on the microphone, guitar strings but not the face can make/break a picture. I need a lens to look serious, but not flashy, to compete with the press boys (& girls). Without wanting to sound self important, people do realise you've got a job to do and give you the space if you look the part and have the kit.