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Review of Carl Zeiss 28mm f/2 Distagon T* 2/28
By: SLR Gear
When Rob Galbraith asked Kornelius Mueller of Zeiss about the anticipated performance of a Zeiss 28mm /2, Mueller speculated that corner softness and CA would be better than present models. Based on test results, Zeiss hasn't produced a significant improvement; corner softness, corner shading and CA are particularly bad, though you'll really only see these issues on a full-frame camera body.