"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.

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

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

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

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 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.

I have just purchased this product and have carried out some test shots. I am delighted with the results. The sharpness is incredible and the colour rendition is very good.I have attached it to my Olympus Pen E-P3 and it matches up perfectly to the camera.

Easily Interchangeable; Lightweight; Quick Focus; Sharp Focus

I have had a short time to use this lens. I am very satisfied with the result so far, I have wanted a wide angle lens for some time but did not want a fish eye lens. The result so far at 9mm is good.

This is an excptionally good lens for use underwater. It has the wide-angle perspective generally considered to be the best for undewater use. If your camera uses micro 4/3 lenses, and it fits into your underwater housing, it is a very good choice. Optical quality is excellent!

Easy To Use; Lightweight; Reliable; Underwater Use