Archive for October, 2015

Sigma 18-35mm f/1.8 autofocus is good

October 5, 2015

Just a quick follow-up to a previous post. I got a lot of use out of my Canon mount Sigma 18-35mm f/1.8 lens with upgraded firmware when my nephew Liam and my brother Jason came for a visit to Central Florida. I previously thought the autofocus wasn’t as good as it is with Canon lenses, but I was wrong. It is about as good as my Canon EF 85mm f/1.8 on the same camera, an EOS 70D. Neither lens gave me perfect autofocus, but I take extra pictures to minimize that trouble. I also used the continuous autofocus feature (Canon calls it “AI Servo” because marketing I suppose) a lot in an attempt to keep up with a four year old. The focus quality seems worse in low light than compared with focusing just once; this seems to be an issue with the camera. Overall, I’m really happy with the lens.

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