Well, the EPM1 is the only m43 body I have currently, and I wanted to try out a 100-300, so here it is: I took it around the morning dog walk. Nothing special, but some samples. First time I had to use "S" mode in a while. P and A mode would only push shutter speed to 1/160 at 300mm, which was too slow even with IS on. Tried both lens IS and sensor IBIS and neither did the trick. So far, I'm finding I can shoot 1/320 with lens IS on. Maybe I'll try more IBIS testing, but the EPM1 is so small, I'm really just holding a lens that happens to have a camera attached. I do like the lens, though. I had read this lens had funky bokeh, but it looks OK to me. I like the reach, and the AF speed is pretty good. It's also a 1/2 meter MFD which is very nice, so flower shots, etc. if I want them. My one issue is how to carry it. This am, I used an R2 strap, but I'm concerned about the tripod mount on my EPM1 supporting this lens. I REALLY wish this lens had a built-in tripod mount. Then, I'd connect the lens to the R2 strap, and I think I'd be happier/less concerned.