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.

Especially at the smaller focal lengths, the corner sharpness remains behind the centre sharpness. This lens, like the Olympus 45 mm 1.8, is an inexpensive lens that offers first class optical performance: a very high resolution, low distortion and low vignetting.

Compact and light weight High optical quality: high resolution; low weight and limited distortion Large viewing angle Low price

Visible chromatic aberration Construction feels cheap

Especially at the smaller focal lengths, the corner sharpness remains behind the centre sharpness. This lens, like the Olympus 45 mm 1.8, is an inexpensive lens that offers first class optical performance: a very high resolution, low distortion and low vignetting.

Compact and light weight High optical quality: high resolution; low weight and limited distortion Large viewing angle Low price

Visible chromatic aberration Construction feels cheap

If you like wideangles, go for it, you won't regret it.

small (unbelievably so); flexible; good quality and good picture quality

No lens hood; slight chromatic aberration; minimum aperture

Olympus ED 9-18mm f4.0-5.6 is a Variable aperture Auto Focus (AF) Ultra-Wideangle Zoom lens with FourThirds max sensor coverage, and it is designed to be used with MFT cameras. What type of photography is the Olympus ED 9-18mm f4.0-5.6 lens good for?

Autofocus, Full-time Manual Focusing, Zoom Lock, Minimum focus distance of, 0.25m / 9.8 inch, Light weight at only, 155g / 5.5 oz, Hood is not supplied, Lens Extends while zooming, Slow Aperture at Tele end, Variable Aperture

Autofocus, Full-time Manual Focusing, Zoom Lock, Minimum focus distance of, 0.25m / 9.8 inch, Light weight at only, 155g / 5.5 oz, Hood is not supplied, Lens Extends while zooming, Slow Aperture at Tele end, Variable Aperture

"This is the most expensive lens I've bought for my E-P1 so far, but it's well worth the cost, especially if you can find it on sale. Olympus has pulled off an engineering miracle in creating such a compact ultra-wide zoom.

Following the micro 4/3 philosophy, is a lightweight wideangle zoom, an angle of view comparable with a 18-36 equivalent in 135 mm or full frame. The cost difference is much wider than the quality diference, comparing with other micro 4/3 wide zoom as Panasonic too.

The M Zuiko Digital 9-18mm f/4-5.6 was announced at PMA 2010 as the second ultra-wide zoom lens to be released for Micro Four Thirds system cameras (the first was Panasonic's Lumix G Vario 7-14mm lens).

You want a lightweight; wide-angle zoom lens that covers most types of subjects; You'd like a lens that requires no readjustment when you fit polarisers and graduated filters; You require quiet autofocusing for shooting video; You need a lens with adequate flatness of field for architectural

You need close focusing and macro capabilities; You require excellent edge-to-edge sharpness.

With the lens attached to an Olympus E-P2 camera body, focusing is essentially silent and surprisingly quick too, thanks to a solution whereby only one compact and lightweight lens element moves on focus.

Yes, I would recommend this to a friend

Lightweight

Poor in Low Light; Slow Focus