Conclusion

The Olympus M.ZUIKO Digital ED 12-100mm f/4.0 IS Pro makes a great all-in-one travel partner to the OM-D E-M1 Mark II camera, forming a fast, well-built, weather-proof system that delivers excellent image quality, not to mention featuring the most advanced image stabilisation system of any camera/lens combination currently available.

Optically, it's not quite a perfect lens though. While both centre and edge sharpness are very high throughout most of its focal length range, the performance drops off a little at the 100mm focal length, where you need to stop down to get acceptable results. Otherwise it's all good news. Chromatic aberrations are almost completely absent, vignetting is not a real issue, and distortion is very well auto-corrected through software algorithms.

The Olympus M.ZUIKO Digital ED 12-100mm f/4.0 IS Pro is a great choice for those users who want an all-in-one solution to their everyday photography and videography needs, covering a very versatile focal range whilst featuring both a fast f/4 aperture and an amazing image stabilisation system. Highly Recommended! 

Ratings (out of 5)
Design	4.5
Features	4.5
Ease-of-use	4.5
Image quality	4.5
Value for money	4