The Olympus OM-D E-M5: Breaking Down the Tech

The E-M5’s integrated electronic viewfinder with 1.44 megapixel resolution not only provides an extremely clear view courtesy of Olympus high-performance all-aspherical viewfinder optics, it provides real-time feedback of exposure and settings with a WYSIWYG (What You See Is What You Get) experience in picture making and movie recording. Elements of the new Creative Control interface can be superimposed onto the live picture to assist intuitive interactivity. An example shown below is the new highlight and shadow curve adjustment feature.

Aspects of Creative Control visible through the EVF include: Highlight-Shadow, White Balance, Picture Aspect and View Magnification

2. World’s first 5 axis image-stabilisation

 

Most contemporary IS systems whether integrated into camera body or lens-based are only able to detect movements in a 2-axis orientation - pitch and yaw. A world’s first 5-axis system has been developed for the OM-D series that provides comprehensive stabilisation for almost all forms of camera shake possible including horizontal and vertical translational movements, as well as roll movement around the lens axis. Overall IS performance is significantly better than two or three axis IS systems. This new stabilisation system is capable of up to -5 EV of image stabilisation. Handheld macro photography is a big beneficiary of this new IS system, as would long-lens or low-light shooting situations.

This new MSC (Movie & Still Compatible) IS unit incorporates Olympus’ pioneering SSWF (Supersonic Wave Filter) dust reduction system for dust-free photography. A new IS drive mechanism enables the effect of stabilisation to be viewed in real-time through the EVF. Like all Olympus PEN and DSLR cameras with built-in IS, image stabilisation can even be extended to OM legacy lenses that are non-electronically coupled, via manual focal length input.

3. Advantages of Contrast Detection Vs Conventional SLR Phase Detection in low-light AF performance

Contrary to popular belief, conventional phase detection (PD) AF systems found in the majority of available DSLRs are actually technology limited in low-light focusing situations and hence provide much lower AF performance even if a large aperture lens (e.g., f1.4) is used, when compared to contrast (CD) AF type systems. Most conventional phase detection systems can only make use of light flux equivalent to f5.6 or 10 degrees by default, even when a taking lens of larger than f5.6 aperture is used. This weakness is inherent in the actual working principle of most PD AF systems in use today as shown in the diagram below.

Contrast Detect AF systems on the other hand benefit make full use of the corresponding increase in the amount of light with larger aperture lenses for better AF accuracy in low-light photographic situations.

 

4. Dust and Splash-proof alloy body

The E-M5 body uses a comprehensive weather-proofing system. When used with the M.Zuiko Digital 12-50mm lens which is also dust and splashproof, the camera system is fully sealed against the elements. The accessory FL-LM2 flash, as well as the HLD-6 battery grip kit are also weather-sealed.

For maximum chassis strength, a special high-precision casting process akin to injection moulding is used to create the rugged magnesium alloy chassis that protects the sophisticated electronics and mechanics.

For other key specifications and features, visit the OMG: It's the OMD Blog post.

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