This is what you can expect from the Nikon 100 f2.8 lens when mounted on a APS-C sensor. I don't think it would be this good on a m4/3 camera because of the sensor characteristics. I would love to try it out on a full frame sensor but I'm about to go out and buy a Nikon FF camera just to satisfy my curiosity.
On a Sony Nex body this lens is equivalent to 150mm lens (x1.5 crop factor) and comes close to my preferred focal length. Some of these longer focal length lenses produce some lovely background blur. The image above shows what this lens is capable of. Simply superb and the peaking function helped me get the fly in focus. This was shot wide open at f2.8.
On a m4/3rd camera it would be the equivalent of a 200mm lens and I find it pretty difficult to hand hold at those focal lengths. On an Olympus body it would be easier because of IBIS (In Body Image Stabilisation) than on a Panasonic body. I haven't used any legacy lenses on Panasonic bodies and I have no intention of doing so. The only reason I use them on Sony bodies, because they have the same problem as Panasonic, namely they use ILIS (In Lens Image Stabilisation) rather than IBIS. That is one great advantage of IBIS, it works with every lens you mount on the body. Don't discount this function as it really does help. Just try it out and see how low a shutter speed you can hand hold at longer focal lengths. I know for a fact that the older I get the more dependant I become on these functions.
