What does Zuiko meaning?

The word Zuiko (ZWEEKoh) is derived from the Chinese characters
for the original Olympus Company name (Takachiho) and the name
of the Mizuho Optical Research Center. The characters can also
be loosely interpreted to mean 'Origin of Light'.

Zuiko Digital lenses

The unique Four Thirds System makes available some interesting lens options. Compared to a full frame digital or 35mm camera, the Four Thirds System offers twice the reach at the same focal length. So a 50mm Four Thirds lens is like a 100mm lens on a 35mm film camera. The following are Olympus’s own Zuiko Digital lenses; all but the last employ Olympus’s latest Supersonic Wave Drive (SWD) technology for fastest auto focus. Note the 35mm/full frame equivalent range in parentheses:

* Olympus Zuiko Digital ED 12-60mm (24-120mm equivalent) f/2.8-4.0 SWD
* Olympus Zuiko Digital ED 14-35mm (28-70mm) f/2.0 SWD (Olympus claims this is the world’s first continuous f/2 zoom.)
* Olympus Zuiko Digital ED 50-200mm (100-400mm) f/2.8-3.5 SWD
* Olympus Zuiko Digital ED 70-300mm (140-600mm) f/1:4.0-5.6

We will provide more details about the lenses later or you can read more specification here Zuiko Digital Lenses