Olympus ZD 25mm vs ZD 12-60mm outdoor resolution comparison with E-420
Here the Olympus 25m pancake delivers a good sharp result that's packed with detail - impressive for an optic that's physically so compact. Indeed there's essentially no difference between it and the 12-60mm when you're comparing the middle portions of each image, as seen in the second row of crops. Move out towards the edges where many lenses become noticeably softer, and the 25mm pancake still holds it together pretty well. The main difference between it and the 12-60mm though concerns coloured fringing. Most obviously in the first row of crops, taken from the top left corner, there's some coloured fringing on the 25mm crop which isn't visible on the 12-60mm sample. A little coloured fringing is also visible on the edges of objects and buildings in the third and fourth row of crops. Again this is absent on the 12-60mm, and allows its details to look better defined. So the Zuiko Digital 12-60mm is optically superior in this respect, but it is of course a premium model that's bigger, heavier and more expensive. Apart from a little coloured fringing towards the corners, we'd say the 25mm pancake performs very well across the frame, and fulfils its purpose as an all-round compact prime lens with little optical compromise. Now let's see how it measures-up in terms of studio resolution.
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