Before it was stolen, I had a Panasonic/Leica 25mm f/1.4 which I used with my E-P3. Although I am planning to use more zooms and fewer fixed lenses than previously, I thought it worthwhile to have a fast standard lens to use in low light conditions and to obtain shallow depth of field at non-telephoto distances. The obvious choice would be to replace the 25mm lens, but, when I used it before with the E-P3, although it focussed very fast and accurately in good and moderate light, in poor light (such as an indoor space at night that was lit with relatively dim artificial lights), it would focus very poorly: it would often take many (sometimes dozens of) seconds to find focus and on many occasions completely fail to find focus at all. This behaviour was markedly worse than, say, the 45mm f/1.8 in similar conditions. Has anyone had experience of whether using it on newer Olympus bodies (either of the OM-Ds for instance, or the latest generation of PENs) improves this behaviour and makes it usable in low light conditions? I know that there are some slight improvements in autofocus performance with the latest generation of cameras from Olympus over the E-P3 and the cameras from the second half of 2011 (in which the fast CDAF was first introduced), but I do not know whether this makes a difference with this particular lens. Otherwise, an alternative is the Olympus 17mm f/1.8 (a lens which I did not have before), which has the advantage of being cheaper, smaller and lighter, but is two thirds of a stop slower and not as sharp on the edges when stopped down.