Back in May I bought the Olympus 25mm f2.8 pancake lens and this is the result of some early experiments. The weaknesses of this lens are quite well documented, but it is very small, which from my point of view outweighs any minor issues with the glass itself (and they are very minor). With this lens fitted my small Olympus DSLR is not much bigger than a large compact camera and that means I carry it around more.