Here are the main tech specs for the new S$698 (incl GST) Micro Four Thirds lens from Olympus.

12-50mm, 4.2x zoom, 3-speed motorised zoom mechanism, MSC mechanism for foast, quiet AF, stop focus and macro magnification at 0.72x (35mm equiv), dust/splash proof.
The main technical specifications are tabulated at the end of this article.
Focal range from 12-50mm (35mm equiv: 24-100mm)
To enable a wide 84-degree angle of view to be captured at 24mm wide-angle, this zoom lens uses a Dual Super Aspherical (DSA) element that requires high-precision manufacturing because of the extremely large ratio between the thickness of the lens center and periphery; as well as double-sided aspherical elements located at an intermediate position between the lenses to correct spherical and chromatic aberrations that can accompany changes in the zoom ratio.

Olympus M.ZUIKO DIGITAL ED 12-50mm f3.5-6.3 EZ Micro Four Thirds lens
In addition, an HR (High Refractive index) element and ED (Extra-low Dispersion) element are combined for optimum correction of color aberrations.
Extensive use of special glass materials in the 9-group, 10-element lens construction of the zoom lens ensures high imaging performance throughout the zooming range.
In addition, all lens surfaces are multi-coated to ensure high transmittance and clear imaging performance even under unfavourable conditions such as shooting against light.
The use of an inner zooming system means that there is no variation in overall lens length during zooming, ensuring that stability can be maintained during handheld shooting.





