Sigma 10-20mm f/4-5.6 EX DC HSM for NIKON AF

Considering the price I would have to say that this lens has to score anexcellent. A little on the heavy and bulky side, this is offset by the performance of this item, which can be picked apart at large magnification , but stop it down a bit and its just fine. I paid £250 for mine second hand on eBay, and I think I did well, as they often fetch near to new price. Bear in mind that the dome of the objective may preclude fitting a skylight or UV filter.

By any standards this is a good lens, when you compare this to the closest Nikon has to offer at this focal length then you see that this is a great lens.
For around half the money of the nearest Nikon, owning this lens makes plenty of sense. The build quality is fantastic and the weight of the item gives you a good impression of the amount of glass within. Image quality is very good, there will be better out there but as i`ve already said, at this price i would say it is peerless.

This is one great lens that really does deserve all of the praise you hear about it. Dont but the Nikor wide angle equivelent , buy this one and do yourelf a favour.

good seller! A++++++++++++++++++++++++++++++++++
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This lens is really, really wide and great fun to use. Given the price, it's excellent value for money. When used at 10mm, it is noticeably wider than the widest Nikon AF-S lens (the 12-24mm - which is twice the price too) so will give your landscape shots even more dramatic effect. Yes, there's some distortion at 10mm, but it doesn't take away from the results in everyday use. It's study and well-built, though the lens cap is terrible (get a Nikon 77mm cap and keep the Sigma in the box). Autofocus is very quick and rarely hunts up and down the range. It's for crop sensor cameras (APS-C) only, so full frame sensor owners should look elsewhere - though it will work on a D3, but in cropped sensor mode. This and the Nikon 12-24mm AF-S are the only autofocusing choices for Nikon D40 or D40x users, and I'm glad I went for the cheaper and wider Sigma!

Solid build quality and well balanced on my nikon d70 body.Phenomenal wide angle coverage and good quality images. Love it!

I bought this lens for indoor and landscape photography. I have had the lens for about 6 weeks and used it recently on holiday in Gran Canaria. The results are fantastic and look totally professional (even though I have only been into photography for 6 months). My camera is a Nikon D70s and this lens is well matched and silent in operation. The auto-focus is lightning fast and sharp.
The indoor shots are superb, I was amazed how much of the room was captured at close range. This lens won the award for 2006, when you see your results you will understand why. If there is one adverse side to this lens it would be this: On some angle shots I had distortion around the edges, however, I have overcome this by fitting a starlight filter, which also protects the lens coating.