https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-7D-and-Sigma-50mm-AF-1-4-lens/m-p/140363#M19311 <P>Recently I upgraded my Canon EOS 7D with the new 2.0.5 firmware. &nbsp;If I set the camera to manual and set any shutter speed, the best f-stop I can get on my Sigma 50mm AF 1.4 lens is f 5.6. &nbsp;Previously I was able to set the f-stop to f 1.4. &nbsp;Anyone have any idea what is causing this problem?</P> Fri, 08 May 2015 00:12:34 GMT azbluedot 2015-05-08T00:12:34Z https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-7D-and-Sigma-50mm-AF-1-4-lens/m-p/140363#M19311 <P>Recently I upgraded my Canon EOS 7D with the new 2.0.5 firmware. &nbsp;If I set the camera to manual and set any shutter speed, the best f-stop I can get on my Sigma 50mm AF 1.4 lens is f 5.6. &nbsp;Previously I was able to set the f-stop to f 1.4. &nbsp;Anyone have any idea what is causing this problem?</P> Fri, 08 May 2015 00:12:34 GMT https://community.usa.canon.com/t5/EOS-DSLR-Mirrorless-Cameras/Canon-7D-and-Sigma-50mm-AF-1-4-lens/m-p/140363#M19311 azbluedot 2015-05-08T00:12:34Z