The Olympus M.Zuiko ED 40-150mm f/2.8 PRO is, mostly, a highly desirable lens - except for one bug. On the positive side, it is very good if not excellent in the primary image quality metrics. It is very sharp across the focal length range including some greatness in the middle portion.

Advantages: 1.excellent image quality; 2. fixed max f2.8 aperture; 3. I just love this focal length range--for me it's the perfect outdoor and portrait lens. It just fits how I typically see the world! Disadvantages: 1. Relatively large; 2. Relatively heavy (compared to other micro 4/3 lenses); 3.

This lens is excellent for portrait, street, sports and landscapes. For a lens of this range, it is compact, beautifully balanced and light weight compared to equivalents used on full frame or APS-C DSLR's.

Regular 'consumer' zoom lenses have a variable maximum aperture, but pros demand a constant f/2.8 lens with consisting top-drawer performance – and Olympus has produced exactly that.

The Olympus M.Zuiko ED 40-150mm f2.8 PRO ($1,499.99) is a serious lens. It covers a longer telephoto zoom range then the standard pro 70-200mm zooms when paired with a Micro Four Thirds camera, and is incredibly sharp from edge-to-edge throughout the entirety of its range, even at f/2.8.

Edge-to-edge sharpness throughout zoom range; No distortion; Protected from cold, dust, and splashes; Excellent close focus capability; Innovative collapsible hood; Manual focus clutch system; Includes tripod collar

Pricey; Lack of optical stabilization an issue for Panasonic Micro Four Thirds shooters

I'm using this lens with a Panasonic GX8. I'm primarily a still photographer. I've used Nikons for 50 years, but use the GX8 and M43 because of the weight, even though there is some reduction in image quality (not due to this lens but to the M43 format), especially at low light or higher ISOs...

This lens is why I packed my OM4T up, put in on the shelf and finally went M4/3. Olympus finally gave me a reason to switch. The reason I used my OM4 for so long was portability. The 40-150 on my M-1 returned the Olympus advantage to digital. This lens is best with the 1.4 teleconverter.

"I've own many micro four thrids lenses since adopting the system. I'll be honest, some haven't met with my expectations. While many lenses in the system are superb by any measure, a large number are what you might call consumer-grade glass good, but not acceptable for professional work by today's...

Handling and Features Performance Verdict Specification This telephoto zoom lens for Micro Four Thirds (MFT) system cameras provides an angle of view equivalent to an 80-300mm lens used on a 35mm format camera and sports a constant f/2.8 maximum aperture throughout the zoom range.

Excellent sharpness; especially when stopped down a little; Relatively compact and lightweight; Robust build; Dust and splash proof; Quick access for manual focus; Good value; Fast focusing

Manual focus control easily nudged; May be a little large for many MFT bodies; Sharpness could be better towards the edges of the frame at 40mm

Okay let's get this straight, this lens is spot on, it's quality and build is second to none, the optics are faultless and coupled with a good camera and a user with a bit of know how then it won't fail you and will give you the results you are after time and time again ...