Sigma 10-20mm f/4-5.6 EX DC HSM
Posted 06 September 2010 - 18:07
Please don't ask questions pertaining to the lens on this thread, rather ask in the Lenses board.
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Posted 07 September 2010 - 00:58
Have had mine since 2006, and 99.9999999% of my images have been taken with this lens.. even some 'pseudo macro' images I occasionally attempt.
This lens focuses really close, something like 20cm, and so has the ability to give a fabulous perspective.
Sharpness may not be up to Pro Nikon standard, but I've never felt it doesn't give me enough(D300 and D70s). CA and other possible aberrations are handled very nicely, and I've had a brief opportunity to play with a Tokina 11-16/2.8 some time back, and the Sigma is definitely better at CA/PF in high contrast scenes.
Not by a lot, unless you regularly pixel peep or print at 100% resolution, but the fact remains that the Sigma is better.
Focus is silent and fast and being HSM doesn't interfere with everyday usage of the lens(ie. full time manual focus over ride if I want)
I rarely use it beyond about 17mm, only really when I don't have easy access to any other lens. If I do need a lens beyond 17mm, my first preference is to go for another lens anyhow. Most of my images posted here will have been captured using this lens, and my only reservation is that sometimes even 10mm(on Dx) is still not wide enough! ;D ... and 8-16mm may be on the cards one day.
I think it's the best value for money UWA lens by a long way.. considering how cheap it is. ... highly recommended for those looking to get one.
Posted 03 January 2011 - 16:14
I was thinking of giving it only a 3 star rating as it is clearly worse than the Nikon 14-24/2.8G in the overlaping range which I gave 4 stars - but perhaps that should have been 5 stars then :
It's pretty amazing sharp (if you have a good copy) and handles light-sources in the image not too bad. But if the light-source is as powerful as the sun you can get some nasty red-brown streaking. So better shield the lens from direct sun.
Has the bonus of a 77mm filter-thread and a 24cm MFD which gives pretty freaking pictures at 10mm.
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Posted 03 January 2011 - 17:54
Performance is (far) better than I did expect. At 20mm e.g. much better in corners at the more small DX format (as it is a DX-lens) than e.g. the FF-format Nikkor 20mm/2.8 AIS lens I tried at same aperture (f5.6). See examples: << HERE >>
Sigma at 20mm is a bit better in quality than at 10mm, mainly seen in corners, but seems reasonable for this extreme angle of views. So for best corner sharpness, stop down to f8 or f11 when used at about 10mm, as used at 20mm you can use f5.6 already. The lens maybe is not on par with the best lenses, but still a very good performer.
I rate it as 4 Stars (above average).
Posted 16 March 2011 - 12:54
Posted 16 March 2011 - 13:59
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