Hi guys, I picked up this even though I don't have a Canon or Canon/m4/3 adapter! My magpie eye fixated on the f1.4 aperture setting but I don't really know what this means exactly. It was bought as part of a huge job lot and I was wondering if anyone here has any information on whether this particular beastie is either 'good' or 'bad'? Is it a useful thing? Is it even something which folk might want? I remain clueless. Thanks in advance for any and all info.