Three Key Sharpness

Three Key Sharpness Tactics to be Used Together

l.  Keep the Shutter Speed Up
    Using shutter speeds that are too slow is one of the leading causes of unsharp images.

2.  Focus on the Eyes 
      Always use a single AF point in the viewfinder.  If you keep all of the AF points activated, the 
      lens tends to focus on the closest object, which may be the shoulder of the duck, rather than
      the face. 

3.  Use Excellent Technique
      Always use a tripod and ballhead for steadiness.