Like any concept, the Four Thirds imaging system has its pros and cons. On the plus side, camera bodies and lenses tend to be very compact, but then the four/thirds aspect ratio that's in keeping with pre-widescreen viewing screens now looks dated.

The lens is stuck. It feels like it is locked, yet the release button doesn't release it. It will not turn, and will not function. I came to Amazon to ask for product support and find warranty information, as it should still be under the manufacturer's warranty.

Like any concept, the Four Thirds imaging system has its pros and cons. On the plus side, camera bodies and lenses tend to be very compact, but then the four/thirds aspect ratio that's in keeping with pre-widescreen viewing screens now looks dated.

The build quality is pretty good for a retractable lens. In its transport position the lens feels tight and solid thanks to high quality plastics. You've to move the lens to its working position prior to being able to taking pictures - this is as easy as simply zooming from the transport position to...

Olympus's ultrawide zoom for Micro Four Thirds offers impressive image quality plus fast and silent autofocus, in a tiny package that makes it easily the smallest lens of its type.

Photographers looking for ultra-wideangle capability in the smallest possible package;

Users demanding the widest angle coverage possible;

The Zuiko Digital ED 9-18mm 1:4-5.6 is without doubt a very good lens indeed, especially for a relatively inexpensive ultra-wideangle zoom. It's sharp even wide open, has negligible distortion, and shows practically no vignetting.

High image quality - decently sharp from centre to corner even wide open; Extremely low distortion; Essentially no falloff/vigmetting; Small and lightweight

Moderate chromatic aberration (although not excessive for an ultra-wide

An affordable compact ultra-wide angle lens for Four Thirds system DSLRs, giving an equivalent angle of view of an 18-36mm lens on a full-frame camera.

Compact; lightweight design; Excellent resolution at f/8 throughout the zoom range; Excellent resistance to flare and ghosting; Fast AF

Chromatic Aberrations at 18mm; Resolution towards the edge of the frame at 9mm

The new Micro Four Thirds cameras from Olympus and Panasonic may have grabbed all the headlines recently, but Olympus at least seems committed to carrying on with the regular Four Thirds format too.

The Zuiko 9-18mm provides dramatic ultra-wide angle performance at an affordable price. The lens is compact, light and seems sturdy. Images are sharp with vivid colors.

Great at capturing wide angle images, landscapes, and even portraits with somewhat unusual angles; It is very lightweight and portable and works well with the E-520

Perhaps not quite as sharp as some of the higher end lenses but more than acceptable for the price; Images tend to show barrell distortion at the widest angle; Sometimes difficult to use with a flash indoors at the widest end as shadows caused by on camera flash are visible.

Very nice and compact wide-angle, but the price, moderate f-stop and focus distance limits this to specialty users who need wide-angle for scenery or architectural shots outdoor during the day.

Easily Interchangeable; Fast / accurate auto-focus; Strong Construction

Poor in Low Light