One of the things I love about the 17mm F1.8 is the snap focus ring with hard stops on the focus travel, its so easy to set at infinity focus without even having to look through the camera. In fact the only thing it lacks is weather sealing. It got me thinking about the 25mm and its older design, wouldn't it be a good time to consider updating some of the older designs? adding the snap focus ring/hard stops/distance scale & some form of weather sealing? For some people, myself included 25mm is still an ideal street/landscape & general use focal length. What do you guys think?