Sigma 30mm f1.4 strange circle appearing

Started Jan 7, 2019 | Discussions thread
QuietOC
QuietOC Veteran Member • Posts: 5,777
Re: Sigma 30mm f1.4 strange circle appearing
1

It would be helpful if posters specified the specific model as there are three optically unique Sigma 30mm F1.4 DC primes:

  • EX (HSM or not depending on mount)
  • Art
  • DN Contemporary

It sounds like this is about the Art version for Canon.

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