DSLR then DRF ... However, with the DRF, there are a range of huge optical and mechanical challenges. Unless someone finds a way of resolving the optical one with a revolutionary optical design, or a Sensor is developed which is far less sensitive to light impacting on it at much more oblique angles than current Sensors do, maybe Leitz's only option is a wholly new DRF. The die-hard traditionalists may not accept such a beast, whilst those with more open minds, could well receive it with open arms.