I apologize for not replying sooner. This photo was shot in Handheld Hi Res mode while on a stable tripod. This photo is the JPEG version of the HHHR shot. It was cropped 62% to a size of 2581x 2481 pixels. This method provides excellent results. As far as Full Frame terms I will leave that to others that are more familiar with those computations.VERY nice shot! I have similar equipment (E-M5.3, 100-400 ; the 1.4 TC) and I am wondering - is this cropped? Also, did you use multiple shots and combining them, or this just a single shot? If you took multiples, how many and at what burst rate? I'm thinking of trying this (when it gets warmer!).
If this shot is cropped, does anyone know what magnification (in FF terms, I suppose) is necessary to completely fill the frame without cropping?