I’ve been using the 100mm f2 for the past few days and have been blown away by its performance. The image above is a test shot to assess any corner vignette. As you can see, there really isn’t any. Some of the zoom lenses from CONTAX will vignette quite heavily, the 28-85 comes to mind, but certainly not this prime. The images from this lens are as close to perfect as I’ve ever seen.