Are there any thoughts about the merits or otherwise for diaphragm shutter v focal plane. Although most of my cameras use a focal plane shutter, I prefer the idea of a diaphragm shutter, as it suggests a more Zen like function, instantaneous highlight exposure, even if the shadows have to wait for the diaphragm to be fully open for correct exposure at the end of the shutter speed. A focal plane is exposing different portions of the scene over a given time span. Am I just mad to even mention this?