Pros
+ Solid finish despite plastic housing
+ Light sensitivity is not reduced, ie exposure values (T, A, ISO) remain unchanged
+ Impeccable sharpness into the corners, the sharpness of the G7 / G9 camera lens is not degraded in the eye test
+ No chromatic aberration (ie no color separation, arising particularly at high-contrast edges) to the image corners
+ No visible vignetting (light fall / vignetting) in the corners
+ Neat and tight-fitting caps
+ Price is justified (although it hurts)
Cons
- Slight barrel distortion
- Heavy and voluminous (but can not otherwise be resolved, because the laws of physics can not be ignored), diameter 96mm, 380g
- Internal camera flash and viewfinder no longer usable
- Cheap-looking bag
- No manual, no technical sheet enclosed and not downloadable
- Not supplied lens cleaning cloth
CONCLUSION
Over the entire zoom range, a respectable sum in imaging performance. Bearing in mind that it's just a "crutch" for the camera (converters are always a "crutch") falls my judgment on very well. In [...] the toilet-DC58B has been compared with Raynox 7000Pro and Raynox 6600PRO (identical test patterns). Raynox offers more wide but at the expense of image quality (sharpness, vignetting, chromatic aberration, distortion). For me no alternative to the Canon. Canon offers the best picture quality in a direct comparison.
