Compared: Canon 28mm f/1.8 USM and Sigma 30mm f/1.4 EX DC HSM

Jeremy Rosenberger Sigma 30mm f/1.4 and Canon 28mm f/1.8 side by side Introduction In February 2005, Sigma announced an intriguing lens--a 30mm f/1.4 "DC" format--"DC" referring to a reduced image circle suitable for digital cameras with ...

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