I recently got a chance to attend the America's Cup Series in Chicago. I took my 100-300 and 35-100/2.8 for the occasion. I was lucky to be on a boat so really close to the action. But i was also unlucky to be on a boat because of the constant movement which made focusing a real challenge. It made me realize that the feature I really miss on my camera is a distance focus indicator. Coupled with a depth of field calculator, it could have helped me use manual focus to improve my keeper rate. There were many markers on the sailing course that I could have used, well, as markers for focusing if I had had a focus distance indicator on the camera, a bit like focus pulling in video. It has to be simple to implement, even as a firmware update for existing camera. It should be a feature that is standard on any pro or enthusiast grade camera like the OMDs.