Maybe someone can clarify. The digital converter of my EM5 magnifies 2 fold, I presume. This presumption is because in the screen a sign is visible of a loupe with '2x' next to it. If I put a 2x converter on a lens, I loose 2 stops. However, the magnifying in the camera is a digital proces, not an optical. So, I am in doubt, do I loose 2 stops or not. My knowledge of digital and/or optical laws is rather limited (in fact it is zero) to construct a logical answer myself. Option 1 loosing 2 stops: a 100/2.8 with digital converter 'on' becomes a '200'/5.6 If so, would a 50/1.4 with digital converter 'on', behave the same as a 100/2.8, in terms of sharpness, DOV, etc? Or Option 2 NOT loosing 2 stops: a 100/2.8 with digital converter 'on' becomes a '200'/2.8 If so, keeping in mind that there is no such thing as a free lunch, what would be the downside?