OM M.Zuiko Digital ED 40-150mm F4.0 Pro System Review
The OM System M.Zuiko Digital ED 40-150mm F4.0 Pro is a compact, lightweight and waterproof telephoto zoom lens for the Micro Four Thirds system.
Featuring a 35mm-equivalent focal length range of 80-300mm, the OM System M.Zuiko Digital ED 40-150mm F4.0 Pro offers a constant f/4 maximum aperture throughout its zoom range, as well as fast and quiet autofocus.
It has an optical formula composed of 19 elements arranged in 9 groups, including two aspherical, two ED, one Super ED and one HR.
Other highlights include a minimum focusing distance of 70cm and maximum magnification of 0.21x, with ZERO (Zuiko Extra-low Reflection Optical) coating to control aberrations, ghosting and flare and a coating fluoride to protect against dust, water droplets, grease, and dirt.
The OM System M.Zuiko Digital ED 40-150mm F4.0 Pro Lens is available now for £799.99 in the UK and $899 in the US.
The 40-150mm F4 is made in Vietnam. This lens does not support the use of Olympus MC-14 or MC-20 teleconverters.
Ease of use
The OM System M.Zuiko Digital ED 40-150mm F4.0 Pro is a waterproof zoom lens with a dedicated metal Micro Four Thirds mount, with a rubber gasket around the mount. Communication between the lens and the camera body is provided by eleven electrical contacts.
Note, however, that to take full advantage of the waterproofing, you’ll need to mount it to a similarly sealed case, such as the new flagship OM System OM-1 camera we tested it with.
Weighing just 382g and measuring 99.4mm in length and 68.9mm in diameter, the OM System M.Zuiko Digital ED 40-150mm F4.0 Pro is an incredibly compact and lightweight telephoto lens. When unlocked and enlarged to 40-150mm, however, it gains another 2cm in length.
The OM-1 OM system used for this test matches the lens very well, offering good balance, fast autofocus and full environmental seals.
The M.Zuiko Digital ED 40-150mm F4.0 Pro lens is very well built, living up to the PRO designation Olympus gave it.
In terms of features, the M.Zuiko Digital ED 40-150mm F4.0 Pro is simpler than some of the larger and faster Olympus Pro lenses.
As with all Olympus M.Zuiko lenses, the 40-150mm F4.0 Pro does not offer image stabilization. Instead, this is provided by the camera body, in this case the OM-1’s frankly incredible 5-axis system, which provides 7 stops of compensation when paired with this lens.
So while the lack of in-lens image stabilization is not an issue for Olympus camera users, owners of other manufacturers’ products that do not offer in-lens image stabilization camera in some of their cameras, like Panasonic, may consider another lens.
With the 40-150mm lens attached to an OM-1 body, focusing proved very quick in most situations. This combination is able to lock focus on a subject almost instantly, even when switching between near and far subjects.
In extreme low-light situations, you may experience a little long-range focus hunting, where a lens with a faster f/2.8 constant aperture would help avoid this.
Manual focusing is done in the traditional way, with the adequately sized focus ring mechanically coupled to the moving lens elements, although there are no hard stops at either end. Focusing is entirely internal and the filter thread does not rotate on focus.
The Olympus M.ZUIKO Digital ED 12-45mm f/3.5-6.3 EZ lens features a 62mm filter thread and a front bayonet to attach the LH‑66E circular lens hood supplied, which twists into place to lock and release it from the lens. The filter thread does not spin on focus, which is great news for anyone planning to use a polarizer or ND grads.
The 40mm focal length provides a 30 degree angle of view.
The 150mm focal length provides an 8.2 degree angle of view.
Chromatic aberrations, usually seen as purple or blue fringing along contrasting edges, aren’t too much of an issue with the OM System M.Zuiko Digital ED 40-150mm F4.0 Pro Lens, except in areas of high contrast. raised.
With the lens set to its maximum aperture of f/4, there is some light drop off in the corners, forcing you to stop at least 2 f-stops to completely prevent it.
The OM System M.Zuiko Digital ED 40-150mm F4.0 Pro does not exhibit much barrel or pincushion distortion, as you can see in the photos below.
Sunstars and Flares
The OM System M.Zuiko Digital ED 40-150mm F4.0 Pro is capable of producing very nice sun stars when stopped at f/22, as shown below, although the lens is susceptible to s flare when shooting directly into the sun, even with the supplied lens hood installed.
The OM System M.Zuiko Digital ED 40-150mm F4.0 Pro isn’t really a macro lens, but it offers a focal point that’s helpfully close to 70cm / 27.55in from the sensor plane and maximum magnification of 0.21x.
Bokeh is a word used for out-of-focus areas of a photograph, and is usually described in qualitative terms, such as smooth/creamy/hard, etc.
OM Systems has paid particular attention to this aspect of lens operation, using a 7-segment diaphragm with rounded blades for pleasing bokeh.
In our opinion, their efforts were quite successful for a telephoto lens – see the examples below to judge for yourself.
In order to show you how sharp the OM System M.Zuiko Digital ED 40-150mm F4.0 Pro lens is, we provide 100% crops on the following pages.