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Cons: Variable aperture Not the smoothest bokeh at times but that seems to be common with most Oly lenses.

Pros: Very good sharpness and contrast. Crazy fast AF on an E3 body was quite remarkable in its day.

Summary: I find this lens has a pleasant character to the images it draws, reminds me of some of my favorite vintage lenses in a way. This is my favorite lens from the classic 4/3rds system. It\'s too bad the early 4/3 bodies had such limited DR or I\'d still make use of them. This lens still gets some use in my collection but doing a very nice job when adapted to an EM1 body. There the AF performance is nowhere near as snappy as on the E3 but the overall IQ is very pleasing and I\'ve shot a lot of really nice close-up work and \'machine portraits\' with this combo.

Cons: Big and heavy for micro four-thirds use.

Pros: Outstanding image quality, fast focus, fast ƒ2.8 aperture.

Summary: I entered the 4/3rds world with this and an E-3 soon after they were introduced, for $2,499. I have no regrets, and have taken several magazine covers with this lens.

Cons: Main points: focus changes with zoom, one has to refocus every time after reframing the composition (not suitable for video either thus); autofocus is not super reliable (was already a problem on my Oly E330); further on: stiff zoom-mechanism; fly-by-wire focussing feels indirect; shame it is not constant F2.8 (but then it would have been even more expensive, I am afraid);

Pros: Very sensible zoom 12-60 (24mm-120mm equiv). Bright F2.8-4 aperture. Sharp throughout the whole range. Distortion and vignetting not absent at extreme settings, but well controled and never a show stopper. Even very usable on the OMD EM10 (though it hunts for focus as it is not built for contrast detect; less suitable for action photography).

Summary: For my use (landcape, architecture and 'slow action') overall the best offer in the Olympus line. A good and flixible allround zoom which just makes great pictures.

Cons: distorsion (but fix in post processing)

Pros: Excellent performer at all focal. Very well build ( dust/ water proof and very solid - I often dropped it and no issue )

Summary: I used it on Olympus E3 and E30. It is the only zoom that I love. Now no longer use any zoom, only occasionally this zoom lens with adapter for m4/3. With 12-60 lens Zuiko gave a excellent glass!

Cons: Size, if comparing to Micro 4/3 lenses. If comparing to the rest of the lenses we've been using the last 50 years, the size is advantageous. I have NO complaint with this lens.

Pros: Likely the sharpest of any lens I have ever used since 1960, certainly sharper than any zoom of comparable range. Contrasty, weather resistant, life changing optic for this old photog.

Summary: I used this lens on my OM-D E-M5 for all kinds of photos, including atop my 1-man raft for 5 days' float down the Grand Ronde River in Oregon and making huge panorama prints. It has never disappointed me. Now my normal lens on an OM-D E-M1 with an Olympus 50-200 2.8-3.5 SWD, they make a combination that seldom leaves anything to be desired for photojournalism. My Nikons, D800e and D600, have not left the house since this Olympus system proved itself to me.

Cons: Autofocus on 4/3 bodies is unreliable, especially at wide angle.

Pros: optical quality, speed, build quality,

Summary: A work of art, surely the best standard zoom ever created. I need say no more about its quality, it's just that good. But unfortunately I had problems with focus accuracy on ALL my Olympus bodies. A replacement lens was exactly the same. I found the 14-54 much more accurate, and kept that instead.

Cons: I have not experienced any.

Pros: Better than all my very good Nikon lenses!

Summary: A real winner.

Cons: A bit dark in the tele end A bit expensive Would need a bit more contrast/color capabilities compared to 50-200

Pros: Great focal length IQ and contrast/color handling is well balanced with the focal length, but compared to 50-200, it feels a bit lame. Amazing all-rounder Weather sealing Well balanced with E-3 and E-5 Works almost as a macro lens, focuses almost to the front lens in 60mm Fast focusing Haven't really regretted buying this lens!

Summary: Great lens. If you need one all-rounder, this is it! 12@24 mm is great for wide end and 60@120 gives you a bit more edge compared to other basic-zooms. If you are running on tight budget, you should consider 14-54 f2.8-3.5 if the extra millimeters aren't your thing. The 2 mms in the wide end are probably more important than the 6 in the tele end.

Cons: Can't really find any.

Pros: + Decent aperture range + Fast focus! + 12mm wide end! + Weather sealed

Summary: A bit heavy for a travel lens, but the weather sealing, big focal lenght range and decent aperture really make this a great all-around lens. I have always felt a bit limited with the Zuiko lenses' 14mm wide ends, but this lens starts from 12mm, making a really nice wide angle view. Autofocus is fast. I can get my E-3 misfocus only if I focus on a blank piece of paper or other totally non-contrasty object. Still haven't had many opportunities to use AF-C. This is the lens I usually have on my E-3 for event photography or just walking around. Lenses like this make the 4:3 system so beatiful.

Cons: f4 at 60mm.It would be great a llitle more speed.

Pros: Everything else. It's a realy pleasant lens. I love the focus speed and the top quality sharp.

Summary: I do almost everything with this lens. For birds and so on I use an old 300mm f4.5

Cons: None? Slightly heavier than the 14-54, but at the gain of more sharpness and useability.

Pros: Sharpness, AF, range

Summary: More glassy goodness from Zuiko.

Cons: Sharpness, versatile focal lenght, fast focus

Pros: Weight, F4 @60mm, price, Slow AF in LV, tends to hunt in LL

Summary: The whole lens adds another 100g of weight in comparision to the 14-54, however, the image quality and the versatile focal lenght of 12 to 60mm makes it truly worth. I have it on my E-620. Well balanced, tack sharp, fast AF makes this to one of the most versatil lenses of Olympus with superior image quality.

Cons: Reviews say it has a small amount of wave distortion at wide angle. I have never seen it ia any real world shots.

Pros: This lens and the 50-200mm SWD are the two best reasons to own Olympus. Huge zoom range covered with two really great lenses.

Summary: If my stuff was stolen this lens would be the first lens I would repurchase.

Cons: Just only the price :)

Pros: Great lens for Olympus users!

Summary: I wanna to recommend this lens!