Introduction
The OM System M.Zuiko Digital ED 40-150mm F4.0 Professional is a compact, light-weight and weather-sealed telephoto zoom lens for the Micro 4 Thirds system.
That includes a 35mm equal focal vary of 80-300mm, the OM System M.Zuiko Digital ED 40-150mm F4.0 Professional gives a continuing most aperture of f/4 all through its zoom vary, plus quick and quiet auto focusing.
It has an optical formulation comprised of 19 components organized in 9 teams, together with two aspherical, two ED, one Tremendous ED and one HR components.
Different highlights embrace a minimal focusing distance of 70cm and a most magnification of 0.21x, with a ZERO (Zuiko Further-low Reflection Optical) coating to regulate aberrations, ghosting and flare and a Fluorine coating to guard towards mud, water droplets, grease, and dust.
The OM System M.Zuiko Digital ED 40-150mm F4.0 Professional lens is obtainable now priced at £799.99 within the UK and $899 within the US.
The 40-150mm F4 is manufactured in Vietnam. This lens doesn’t assist using Olympus MC-14 or MC-20 teleconverters.
Ease of Use
The OM System M.Zuiko Digital ED 40-150mm F4.0 Professional is a climate sealed zoom lens with a devoted Micro 4 Thirds mount that’s made from metallic, with a rubber seal across the mount. Communication between lens and digital camera physique is offered by way of eleven electrical contacts.
Notice nonetheless that with the intention to take full benefit of the weatherproofing, you’ll need to mount it on a equally sealed physique, like the brand new flagship OM System OM-1 digital camera that we examined it with.
Tipping the scales at a mere 382g and measuring 99.4mm in size and 68.9mm in diameter, the OM System M.Zuiko Digital ED 40-150mm F4.0 Professional is an extremely compact and light-weight telephoto zoom lens. When it is unlocked and zoomed out to 40-150mm, although, it does achieve one other 2cm in size.
The OM System OM-1 used for this check is an excellent match for the lens, providing good stability, quick auto focus, and full environmental seals.
The M.Zuiko Digital ED 40-150mm F4.0 Professional lens may be very effectively constructed, totally residing as much as the PRO designation that Olympus have given it.
By way of options, the M.Zuiko Digital ED 40-150mm F4.0 Professional is easier than a few of the the larger, quicker Olympus Professional lenses.
As with all Olympus M.Zuiko lenses, the 40-150mm F4.0 Professional doesn’t provide picture stabilisation. As an alternative that is offered by the digital camera physique, on this occasion the frankly wonderful 5-axis system within the OM-1, which offers 7 stops of compensation when paired with this lens.
So whereas the shortage of in-lens picture stabilisation is a non-issue for Olympus digital camera customers, house owners of different producers merchandise who do not provide in-camera picture stabilisation in a few of their cameras, like Panasonic, might wish to contemplate a special lens.
With the 40-150mm lens connected to an OM-1 physique, focusing proved to very fast in most conditions. This mix is able to locking deal with a topic nearly immediately, even when alternating between shut and faraway topics.
In excessive low-light conditions it’s possible you’ll expertise a little bit focus looking on the lengthy finish, the place a lens with a quicker f/2.8 fixed aperture would assist keep away from this.
Handbook focusing is completed in a standard trend, with the adequately sized focus ring mechanically coupled to the transferring lens components, though there are not any onerous stops at both finish. Focusing is totally inside and the filter thread doesn’t rotate on focus.
The Olympus M.ZUIKO Digital ED 12-45mm f/3.5-6.3 EZ lens includes a 62mm filter thread and a entrance bayonet for attaching the provided LH‑66E round lens hood, which twists into place to lock and launch it from the lens. The filter thread doesn’t rotate on focus, which is nice information for anybody intending to make use of a polariser or ND grads.
Focal Vary
The 40mm focal size offers an angle of view of 30 levels.
40mm
The 150mm focal size offers an angle of view of 8.2 levels.
150mm
Chromatic Aberrations
Chromatic aberrations, sometimes seen as purple or blue fringes alongside contrasty edges, aren’t an excessive amount of of an issue with the OM System M.Zuiko Digital ED 40-150mm F4.0 Professional lens, besides in areas of very excessive distinction.
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150mm
Vignetting
With the lens set to its most aperture of f/4, there’s some mild fall-off within the corners, requiring you to cease down by no less than 2 f-stops to fully forestall it.
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150mm
Distortion
The OM System M.Zuiko Digital ED 40-150mm F4.0 Professional does not exhibit very a lot barrel or pincushion distortion, as you’ll be able to see within the pictures beneath.
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150mm
Sunstars and Flare
The OM System M.Zuiko Digital ED 40-150mm F4.0 Professional is able to producing fairly good sunstars when stopped-down to f/22, as proven beneath, though the lens is prone to flare when taking pictures straight into the solar, even with the provided lens hood fitted.
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150mm
Macro
The OM System M.Zuiko Digital ED 40-150mm F4.0 Professional just isn’t actually a macro lens, nevertheless it does provide a usefully shut focus level of 70cm / 27.55in from the sensor airplane and a most magnification of 0.21x.
Bokeh
Bokeh is a phrase used for the out-of-focus areas of {a photograph}, and is normally described in qualitative phrases, reminiscent of easy / creamy / harsh and so forth.
OM Programs have paid shut consideration to this facet of lens use, using a 7-segment diaphragm with rounded blades for some pleasing bokeh.
In our view, their efforts have been fairly profitable for a telephoto zoom lens – see the examples beneath to evaluate for your self.
Sharpness
As a way to present you the way sharp the OM System M.Zuiko Digital ED 40-150mm F4.0 Professional lens is, we’re offering 100% crops on the next pages.
