Shame as the 28mm 2.8 non-is is one of my favourite lenses. [/color]
I do have the EF24mm f/2.8 and the EF28mm f/2.8 lenses. I used them for B&W photography. When I was printing A4 to A4 size I did not quite like my EF28-70 f/2.8 so I stopped using it and started using my fixed focal length lenses. The 2 lenses mentioned above were my favorite.