Review by Klaus Schroiff, published December 2015

A few weeks back we reviewed this lens on the EOS 5Ds R. For obvious reasons we are reusing some portions in this APS-C format review again.

Introduction

The most significant new feature in this lens is Canon's new BR or "Blue Spectrum Refractive" element. To cite Canon: "The optical element offers characteristics that significantly refract blue light to achieve what the developer is calling “impressive levels of (axial) chromatic aberration correction”. Canon also applied its new fluorine coating to repel dust and smearing on the front and rear element. The new SWC (sub-wavelength coating) on the rear surfaces of the first two highly curved elements is meant to reduce flare. We'll see whether all this can make a difference ... and justify the price tag.

Used on an APS-C format DSLR, the lens behaves like a "56mm f/2.2" in terms of field-of-view and depth-of-field - or in other words - like an (expensive) standard prime lens.

If you know the old lens, you will noticed that the mk II is quite a bit longer (2cm) and also heavier (180g). This is promising to some degree - bigger tends to be better after all. Whether you appreciate this in your lens bag may be a different story though. Typical for such professional grade lenses it is beautifully crafted based on a metal body and high quality plastics. Canon also claims to have improved the weather sealing compared to the mk I version. The very broad, rubberized focus ring has a smooth action. The size of the lens remains constants regardless of the focus setting. A deep petal-shaped hood is included.

As usual Canon used its Ring-type USM AF in this lens. While it is certainly near-silent, we think that the AF speed is slightly reduced albeit still fast. Full-time manual (FTM) focusing is, of course, always possible in One-Shot AF mode.