rarmstrong Posted February 14, 2009 Share Posted February 14, 2009 <p>Thomas, there would be no reason to believe that a quality lens should be soft at f1.8. My Sigma 30 mm is razor sharp at f1.4. But, the DOF at 5 feet at f1.4 is very thin. So, your focus has to be very accurate(single point using AF). Manual focusing is a great way to learn this.</p> Link to comment Share on other sites More sharing options...
chris cornwell blog Posted February 15, 2009 Author Share Posted February 15, 2009 <p>I try to focus at the eyes or 'eye' and have gotten really sharp images. So, I think my lens is doing what it should. However, I get more unfocused (eyes) images than not. Then, I tend to take several shots of the same look to make sure I have a sharp one.</p> Link to comment Share on other sites More sharing options...
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