Olympus M.Zuiko Digital ED 40-150mm F4.0 PRO for Micro Four Thirds System Camera Compact Powerful Zoom Weather Sealed Design Fluorine Coating

Don't you just love micro 4/3 !! Incredible lens and very light and compact for its reach. It's also very sharp and not a cheapie 'kit lens'. The 40-150mm/F4.0 PRO (80-300mm 35mm equiv) does fine in reasonably good lighting. For lower light I would probably opt for the 40-150mm/F2.8 but it's understandably larger, heavier, and costs more. But if I had to carry just one lens and only one lens it would probably be my OM 12-100mm/4.0 (24-200mm 35mm equiv).

Awesome lens & worth every penny, love it.

I have the expensive big brother to this lens, the Olympus 40-150mm f2.8. It's fantastic and sets a high bar for performance and build quality. I also have the cheap but cheerful little brother, the Olympus 40-150 f4-5.6 R and it is the best zoom you can get for ~$100. This lens fits in the middle with a compact design, excellent IQ (close to its big brother), and weather sealing (something the little brother doesn't have). I love the twist action to extend the lens from its travel configuration. From then on its all internal focusing and zooming. Just fantastic. Some reviewers hate the fact that you need to extend the lens to use it, but I think it is genius. I have no problem extending this lens when I start using it. I pair this lens with an E-M5ii and the Oly 12-45mm f4 in a compact travel kit. It's big and little brothers get paired with an OM-1 and E-PL9 respectively. You can't go wrong with this lens. OMDS/Olympus made a winner here that aligns with the compact, light-weight, rugged, and quality ethos of its MFT ecosystem.

Real like the lens for bird photography. Weather proofing is a big plus and auto focus is way better than Fuji which I was using previously.

For my m43 outfit I try to keep things small. I also have full frame, so the m43 stuff has to be compact to make sense. My main m43 telephoto has been the Panasonic 35-100 f/2.8. It's terrific and quite small, but sometimes I want a bit more reach, so I bought the Olympus 40-150 f/4. Both lenses are sharp even wide open. But since I'm not going to carry both at the same time, I have to decide if I want the extra reach of the 40-150 or the extra speed of the 35-100. You can't go wrong with either, and they both seem to work equally well on Olympus cameras. Neither of these lenses is cheap, but as I've said before, with a small sensor like m43, you really can't cut corners with lens quality. The 40-150 f/4 is a "Pro" series lens which means two things. it's water resistant and it's really sharp. Otherwise it's like other Olympus lenses, partially metal and partially plastic. I wouldn't say the zooming is silky smooth, but it does the job. The lens collapses to reduce length when not in use. This works well because there is no locking mechanism--you just turn the ring. Bravo, Olympus! I've had collapsable lenses with lock buttons and they are a two-handed, time wastin' PITA. The included lenshood does have a lock button, but since they got the lens right, I can forgive the hood. (Locking lenshoods make sense if the hood is rectangular; the lock assures proper positioning of the rectangle so it doesn't cut the corners of the image. With a round hood, there is no point). I just have to remember which of my lenshoods need to be unlocked and which don't, so I don't break anything. Summary. Sharpness is very good, focusing speed is very good, image stabilization is very good. Contrast seems a little low, but ok. Focuses really close! Personally, I don't miss having extra buttons on the lens or the manual focus clutch thing. I have lenses with these features and don't use them. Your needs may be different. One interesting bit of trivia; the 40-150 always opens to f/5.6 for starters. You would think it would default to f/4 but apparently not. All in all, a very good lens priced like a very good lens. If you're happy with a less expensive zoom in this focal length range, don't try the 40-150/4 because you'll be spoiled.

Sharp, lightweight, compact and decent build quality. Not for a low light or pro work, but very decent lens for a hiking/travel with good lighting conditions.

High quality, the weatherproofing is amazing. Takes outstanding shots in some crazy conditions, have used in very cold weather, rain, and a blizzard

Razor sharp and great colors and contrast "out of the box". It's not super light but light enough for my backpack. Worth it to bring back the best images. These Olympus PRO lenses are just a level above the competition.

Let's get the negative out of the way first. It doesn't feel like a weapon grade build, and it needs to be extended before use. Then the positive: it's small, light, sharp, sharp, sharp. It focuses close and has no aberrations that I can see. And it's weather proof. It's a winner with the 'extend-me' first feature. This feature also makes the lens small. It's good value to!

Small and light for a 300mm zoom lens

Very good

I have the Olympus 40-150mm f2.8 Pro lens but was finding it rather heavy when out and about for over 3 hours. I bought this f4 Pro lens, with the same focal length. It’s half the size, half the weight, and much easier and lighter to carry around. OK it doesn’t have some points, fn button, Tele-converter (which fits the f2.8), and the manual clutch. However, you can use the AF/MF switch on Live View or convert a button on the camera - I use the EM1iii. I found the auto-focus very quick, compared to some Olympus lenses, and this is the first lens produced by OM Systems. Since I bought it a couple of weeks ago, it’s become my main lens.

I use this as a travel and landscape lens for longer walks when weight is a consideration. Build quality is good if not the ultimate in material quality. Focus is fast and accurate. It is, as you no doubt know, very compact and lightweight for the reach available. Normally I don't like collapsing lens designs but I only ever have it compacted when it's in my bag. It's a great match for the OM 3, the optics are fantastic, sharp from f4 to f8 across the frame, with strong colour reproduction and contrast. Close focus is pretty good. It's a, shame not to have the focus clutch and function button as I use them on other lenses. It is not a portrait, sport, indoor or birding lens - but it is a superb walkaround all rounder in conjunction with one of the pro series standard zooms. I got it for the right price, but I'd say it's overly expensive at the RRP. Buy with confidence but don't expect it to perform shallow depth of field or high speed miracles!