(Dpreview 2017) Sigma 150-600 C strange behaviour Google the words "Sigma lenses autofocus problems 150-600mm" (without the quotation marks) to see over a million search results on these key words.Ĭontrast Detection AF - Can it miss focus? Sigma 150-600 Contemporary
Sigma 150 600mm contemporary lens amazon update#
In some cases, a Firmware update fixed issues but then when users upgraded their cameras with newer bodies the problems set in again. Many (but not all) of the complaints relate to APS-C DSLRs like the 7D II, 60D and the 50D. There's more than a few mentions of this here on the DPreview forums as well. Unfortunately, a lot of us never think to look up these comments before buying a product. I know that this isn't an issue relating to focus adjustments since the sensor itself does the auto focusing.Ĭomplaints about the Sigma 150-600mm (C) lenses not working properly with Canon DSLR camera are all over the internet. I have the Canon M5, and basically I've been finding that Sigma's telephoto lenses often front/back focus. The M5 is hardly old and is even sold new today. Sigma once claimed that users were at fault for using "old cameras" with their new lenses. This affects Canon cameras in particular but also affects Nikon users. This is an issue that plagues many, many Sigma lenses and sometimes, the lens performs well initially but later begins to become unreliable. but it had no effect on Autofocus inconsistency. The common problem of Front Focus and Back Focus was sometimes (but not always) resolvable with the optional Sigma Lens Dock.
The other lens (150-600) has its own fair share of similar issues. I believe this was one of the lenses (100-400) that Sigma issued a notice on their website for. It led to a comment I made just yesterday that annoyed a few of the Sigma fanboys here. I have heard of this issue with Sigma lenses on EOS DSLRs from Canon. I also had this issue with Sigma's 100-400mm.
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