Sigma 50 mm f/1.4 - BEWARE!!!!

Started Feb 23, 2013 | Discussions thread
Kwick1 Contributing Member • Posts: 829
Re: Sigma 50 mm f/1.4 - BEWARE!!!!

From Roger Cicala at

"It has become apparent through many tests and online forums that the Sigma 50 is a "special lens". I was glad to find this out because it was driving me nuts. It’s a very nice lens that, when you use it just right, produces images with superb sharpness and smooth bokeh. Here’s the summary:

1) It works very well on crop frame cameras and at middle (5 to 15 feet) distance, so it’s a wonderful indoor lens. 2) On full frame cameras and to a slight extent on crop frame cameras, the lens exhibits what I will term “schizophrenic autofocus”; i.e. when closer than 5 feet, it will front focus, further than 20 feet it will backfocus. This is not a calibration issue, it’s just how it is."

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