sigma 20mm f1.8 on APS-C size

Started Aug 20, 2010 | Discussions thread
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nosenseofplace
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sigma 20mm f1.8 on APS-C size
Aug 20, 2010

anyone has used it,any experience? hot it perform? i know on FF it give you some soft corners that must be avoided in part on a APS-C size lens

another question: AF performance? it depend on camera also ? i mean on a D300s or a D90 its fast?

thanx
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