Olympus M.Zuiko Digital ED 12mm f/2.0 Micro Four Thirds Lens Review

Olympus M.Zuiko Digital ED 12mm f/2.0 Performance

The premium status of this lens doesn't stop at the build quality and features. Sharpness in the centre of the frame at maximum aperture is outstanding and good towards the edges of the frame. Peak quality across the frame is achieved at f/4 where the clarity in the centre is still outstanding and approaching excellent towards the edges. Stopping the lens down further reduces sharpness due to diffraction, but sharpness is still very good across the frame down to f/11.

Resolution @ 12mm

How to read our charts The blue column represents readings from the centre of the picture frame at the various apertures and the green is from the edges. Averaging them out gives the red weighted column. The scale on the left side is an indication of actual image resolution. The taller the column, the better the lens performance. Simple. For this review, the lens was tested on a Panasonic Lumix G3 using Imatest.

Chromatic aberrations are well controlled, just exceeding half a pixel width between f/5.6 and f/8 towards the edges of the frame. This low level should pose few issues, even in large prints or harsh crops from the edges of the frame.

Chromatic Aberration @ 12mm

How to read our charts Chromatic aberration is the lens' inability to focus on the sensor or film all colours of visible light at the same point. Severe chromatic aberration gives a noticeable fringing or a halo effect around sharp edges within the picture. It can be cured in software. Apochromatic lenses have special lens elements (aspheric, extra-low dispersion etc) to minimize the problem, hence they usually cost more. For this review, the lens was tested on a Panasonic Lumix G3 using Imatest.

As falloff and distortion are corrected by the camera's image processing engine when shooting JPEGs, falloff and distortion will only be easily visible when shooting in RAW format.

Falloff of illumination towards the corners of the frame is well controlled, especially for a wide angle lens with a fast aperture. At f/2 the corners are only 1.1 stops darker than the image centre and visually uniform illumination is achieved by f/4.

Distortion is kept low for a wide angle lens, with Imatest recording 1.12% barrelling. As the distortion pattern is uniform across the frame, this should also be easy to correct in image editing software afterwards.

In use, this lens proved itself highly resistant to flare and loss of contrast, yielding contrasty images, even in harsh contra-lighting situations.

The first four images were taken with the Panasonic G3 used for testing. The last four were taken with an Olympus E-PM1.

Add your message