Returning to the qualities of the lens, I must admit that it's the nearest to being a perfect model of all the many I've used by various manufacturers. But aside from the focusing considerations, the strong impression I have is that the lens would be far too front heavy and generally badly balanced on the E-M1, unless you added a battery grip to it. I have yet to see 16 megapixel images taken with the lens by a micro four thirds camera and I would very much like to take some pictures of my own at that resolution or preferably higher. Possibly the E-5 focuses faster than the E-3 and if it does, then that would be a reason to choose one camera over the other. This does scant justice to the resolving powers of the lens and I find it difficult to see that 12 megapixels would be much of an improvement. My own solitary Four Thirds camera is an E-3, which produces 10 megapixel images. A rare achievement indeed to produce results as outstanding as this throughout the zoom range. What stands out is that there is very little discernable difference between the edges and corners of the frame and the very centre. It's also faster than I personally need it to be, but even wide open on the odd occasion I've tried it that way, the results are wonderful. The build quality is absolutely top class and better than I really need it to be. However, I agree that this 'Super High Grade' specimen is on a different level altogether to either the ZD 11-22mm f2.8-3.5 or 14-54mm f2.8-3.5 zooms respectively. I consider the 50mm f2 macro to be superb, incidentally.
![e system lens e system lens](https://wide-angle.nl/wp-content/uploads/2019/12/RV284793.jpg)
Other reviewers have pointed out that Olympus 'High Grade' lenses are uniformly excellent at the very least.
![e system lens e system lens](https://www.camerahouse.com.au/media/catalog/product/cache/image/e9c3970ab036de70892d86c6d221abfe/e/-/e-m5markiii_slv_front_14-150ii_1.jpg)
In my opinion, based on a satisfying experience of shooting with four of its finest lenses, these are amongst the best digital lenses ever made by any manufacturer. You won't find new online reviews of it by the popular and trusted sites because the Four Thirds system is dead.
![e system lens e system lens](http://az163874.vo.msecnd.net/143c9f515cff4d86ab6f0969faac3792/Images/Products70153-1000x1000-1457068857.jpg)
I find it personally quite sad that this particular lens, billed as the world's first digital zoom with an f2 aperture, is more of a minority item than ever and it deserves a better fate than that. My understanding is that the E-M1 falls slightly short of the mark, because none of its focus sensors are cross-hatched and that's bound to inhibit the powers of the lenses, which rely on a phase detect autofocus system to operate properly when subjects are moving. I don't (yet) own an Olympus E-M1, but the manufacturer was evidently hoping to keep its faithful old Four Thirds customers happy with a camera that finally enabled some absolutely fantastic lenses to perform almost as well as they did on the platform they were originally built for. Heavy and expensive focus struggles somewhat with erratic moving subjects