Conclusion

When we started testing the Olympus 9mm f/8 Fisheye Body Cap lens, we fully expected it to perform at the level of “toy lenses;” but this ultra-thin, ultra-lightweight lens has surprised us with more than decent images that only suffer from soft corners and comparatively high levels of chromatic aberration around the edges. Otherwise it is an entirely usable lens with a generous sweet spot of sharpness, relatively low vignetting and a surprising resistance to flare. Of course if you haven't bought into the Micro Four Thirds system yet, this lens alone will certainly not cause you to make the switch, but if you already own an MFT camera, the Olympus 9mm f/8 Fisheye Body Cap is a no-brainer – especially if you have always wanted to try out a fisheye lens but found the prices of the available offerings too steep. This fun little lens takes up almost no space in your gear bag, and is extremely easy to use – the only thing to watch out for is that it's unfortunately possible to focus beyond infinity, which will result in out-of-focus images, so make sure not to bump the focus lever accidentally. At £89 / $99, it might be expensive for a body cap, but represents excellent value as an “entry-level” fisheye lens.

Ratings (out of 5)
Design	3
Features	2.5
Ease-of-use	4
Image quality	3.5
Value for money	5