Sigma 30mm F1.4 EX DC HSM
Announced Feb 14, 2005 •
Prime lens | Canon EF-S, Nikon F (DX), Four Thirds, Pentax KAF, Sony Alpha, Sigma SA
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Hi everybody, I got a second hand Sigma 30mm f1.4 which is in good shape except one minor problem: it squeaks like a seal when focusing and hunts quite a bit because the friction of the focussing mechanism causes stick-slip effects. I can feel the friction is higher that it should be when I focus manually. In good light the focusing work better simply because the motor works harder. Still focus is a bit of hit and miss. Now I had a similar problem with a sigma 50-500mm of which the af motor...
I am a new owner of a Sigma 30mm f/1.4 EX DC lens and I am trying to figure out its performance right now. I am aware that a lot of people who accuse their Sigmas of having front/back-focusing problems are actually witnessing a camera body calibration problem in phase detection autofocusing and only noticed it with the Sigma because its shallow DOF at f/1.4 exposes camera calibration issues much more than standard aperture lenses do. I decided to test my new lens on my Rebel t4i and I’m a...
Hello Everyone,I posted a similar thread on another forum but haven't gotten a response. I'll try to keep this one brief and to the point.I bought a Sigma 30mm f/1.4 lens a couple weeks ago, and after taking some basic test shots of my kids and dogs around the house at f/1.4 - 2.0, I'm not getting the same razor sharp results that I saw on a lot of the sample pictures people posted using their Sigma 30mm. I understand it won't be super sharp all the way across when it's wide open, but mine...