dude, dun be too greedy, none of mega zoom, in fact none of compact camera as i can recall come with constant aperture lens.
even on our DSLR world, the constant aperture lens zoom range are less than 4x


none of us doubt on small sensor capability, in fact many ppl here did take great picture with compact camera or phone camera, that jz depend how u master ur gadget on ur hand

for what guys above try to tell u are: since u own a micro 4/3 camera, do not expect u can get par to current camera output quality with mega zoom camera.