Where is the "Sweet Spot" of your lens?
Photographer, Robert Lightfoot, asked me where was the sweet spot of my lens? I did not have an answer. Do you know that answer for each of your lens? This Zoom Lens is from 24-105 and I found with newspaper that using auto focus that the sweet spot of this lens was F9.0 Now have I ever used 9.0? NO. But I will now. Test your own lens (even your point and shoot cameras). When depth of field is not the issue, use the sweet spot for the sharpest images.