The Olympus 25mm lens exhibits a little coloured fringing in the extreme corners throughout its aperture range - this is apparent in all three samples below, although in the first with the aperture wide open at f2.8, the vignetting is masking some of the effect. Judging from our other tests, this fringing appears to be the biggest optical issue with the 25mm pancake lens, and it's a shame you can't completely eliminate it by stopping-down the aperture. To see how it impacts a real-life situation, see our first outdoor results page. Otherwise, let's continue with the results on our fringing and macro page.