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Sigma's semantics
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Re: Sigma's semantics
Sigma's DC line is essentially just like the Canon EF-S lenses. Smaller and lighter due to needing less glass to fill the smaller image circle of the APS-C cameras. The 18-50 is still subject to the 1.6x crop factor, so yes, it's a 28-80 equivalent in 35mm terms. Sigma's DG line is Optimized (rather than Designed) for…
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