Great lenses. Wish it came with soft case though.

Lightweight

Poor in Low Light; Slow 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 lens is fill my expectantions.

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

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...

"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.

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.

Unbelievably small size for the scene it covers. Contrast is good, detail is moderate (i.e. detail would begin to get fuzzy after approx two levels of zoom). This happens on most ultrawides and cropped sensors due to the span packed on a small space.

Been looking at an ultra wide lens that didn't break the bank to compliment my 12-40. At first I was a bit sceptical that 9mm would be wide enough but this ticks the boxes. Besides I can also use my square filters with it! A must buy.

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