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Great product - AF for Sigma lenses don't seem to function

Started Dec 25, 2013 | User reviews thread
Keith Z Leonard Veteran Member • Posts: 6,134
Re: Unfair to Penalize Canon for Sigma shabby work

I think you are being somewhat harsh there, sigma is supposed to predict the future somehow? It is a change in the AF algorithm, or perhaps that the newer camera can detect that the lens is a sigma and refuses to work. Third party lenses will sometimes report as a first party lens id, and if that first party lens is dropped then the third party one will also cease to work.

Granted it isn't a great situation, but if canon wanted a level playimg field they would license out the af algorithms, but clearly they dont. In the past they should have had no fear, sigma lenses were clearly a lesser/cheaper alternative..now that seems to have changed since the sigma primes can clearly compete with the canon lenses.

 Keith Z Leonard's gear list:Keith Z Leonard's gear list
Canon EF 70-200mm F4L USM Canon EF 100-400mm f/4.5-5.6L IS USM Sigma 50mm F1.4 EX DG HSM Canon EF 24-105mm f/4L IS USM Canon EOS 400D +16 more
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