I love it when an uninformed ebay seller screws up a listing and creates a major bargain for the person that stumbles across it. This seller listed this lens as a 140-600 (since that's what the "equivalent" label on the lens barrel says). As a result, nobody who was searching for the lens stumbled across it. I found it inadvertently when I did a broad search of any Olympus branded items auction listed and ending soon. Starting bid was $25 + $12.75 shipping. Which also happened to be my WINNING bid as the only bidder. (I had actually bid over $66 for this lens, but nobody got to see that, since my initial bid for this lens was uncontested). So, total cost out of pocket was just under $38. Oh, and it arrived today in PRISTINE condition. First observation is, the thing focuses surprisingly fast on my E-M1, and the ergonomics are also quite decent. 2nd observation is the Olympus TCON-17 works pretty darn well on this lens, although it noticeably slows down the AF and results in far more AF-hunting than occurs without the TC (without the TC, focus hunting is almost nonexistent on the E-M1). I would also say that this lens is optically not as mediocre as it's reputation (at 300mm, it's slightly soft wide open, but otherwise I did not have any complaints about what I was seeing). 3rd observation is that it handles pretty well on the E-M1 - on my E-PL5, the handling is as ridiculous as you would think it would be. With the TCON 17, this rig will actually give me AF out to an effective 1040mm (not bad for an under $50 lens, and an under $50 teleconverter). And since the TCON-17 has a wider entrance pupil, there is little to any light loss nor vignetting. Tomorrow, I plan to do a lot more shooting with this lens, with and without the TCON-17, and I'll post some of the more interesting results.