This lens is much like its 28mm brother. That review can be seen here. It is soft wide open but quite usable by f5.6. Contrast is a bit low. Fringing will occur at wide apertures. Distortion is well controlled but vignetting is obvious at f2.8. Color rendition is on the cool side. I suggest custom white balancing with this lens. It was very difficult to focus w/out magnified assistance and that only helped a little. I assume it will be significantly affected by stray light. Boken fringing is well controlled and this is typical of wide angle lenses that do not have macro capabilities. As a budget lens it is a good performer and better than I expected.