Digital Camera Lens Hood / Rain Hood

Step 4: Grinding a bevel in the large end

By taking away material on the inside of the large end of the PVC hood, I eliminated the vignetting on my Lumix (throughout the entire zoom range as well). It may not be necessary on another camera (but for that matter, the vignetting might be too severe on another camera to solve this way. The only way to test it would be to go to the hardware store with your camera and play around).