Sigma50 1.4 is my 1st fast lens wider than 1.8. I am able to attain good focus satrtint @1.8 but by the time I use larger than that, I get random blurry photos which annoys me in using it that wide. I am not blaming the lens, its me who is at fault here. How should I deal with it? Or is there a possibility that the lens could be faulty at these apertures ( 1.4 to be exact)? I get sharp images from f2 onwards and don't have any issues of front or back focus from there. 1.8 is a bit softer but nails. Its just that when I attempt to go lower than 1.8, the dilemma starts. Again, I consider it human error so any tips or maybe tricks from you guys in using this lens at 1.4 can help me a lot.
Here is my observation, if the lens is focusing, it makes a little adjustment before confirming focus. It is then that I get good photos. But sometimes (lets say often times), the camera beeps without that micro movement and thats the time I get blurry photos. Your advises will be appreciated. Thanks