Until now, super-wide-angle lenses tended to be big, heavy, and expensive, making it difficult for most camera users to take advantage of them. The ZUIKO DIGITAL ED 9-18mm F4.0-5.6 promises to change all this. With its ultra compact and lightweight design and the outstanding portability, thanks to the DSA (Dual Super Aspherical) lens, available only with the Four Thirds System, this lens will make super-wide-angle photography friendlier and more affordable. Despite its compact size — it's just 73 mm long and weighs a mere 280 grams — this lens boasts a long focusing range equivalent to 18-36 mm on a 35-mm camera lens.
Strengths: 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.
Weaknesses: 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. Not weatheproof, but then again not expected at this price point.
Bottom Line:
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.