« on: November 27, 2014, 09:16:53 AM »
I'm not sure how the Sigma compares to the Nikon 24-120mm, then it's 15mm shorter & suffers from Sigma's reputation for having AF problems, so I wouldn't be surprised if the Sigma w/ F mount didn't sell well either.
The Nikkor was designed with the idea of correcting CA in software in mind. If one accepts this it's about on par with the Sigma or the Canon 24-105. The same situation as with the Canon - no great benefits, but also no first party service and you lose one lens that counts against the requirements for CPS/NPS.