The Sigma Quattro series cameras (DP and sd) all have a built in 21:9 crop mode. On the sdQH you end up with 16 megapixel panoramic shots. The framing can be set to blackout or as a darker transparent framing guide. The darker setup is great as it lets you see outside of the 21:9 frame. The RAW file has the full 3:2 data in it and Sigma's processing software auto crops based on the camera crop selected. AFAIK nobody else has a mode like this. Hopefully Sigma keeps this feature on the L mount cameras.