ephotozine Olympus M.Zuiko Digital ED 7-14mm f/2.8 PRO Review

O.O 好毒 , 如果落OM BODY 應該會更加好

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http://www.ephotozine.com/article/olympus-m-zuiko-digital-ed-7-14mm-f-2-8-pro-review-27761

Olympus M.Zuiko Digital ED 7-14mm f/2.8 PRO Review - Gary Wolstenholme puts the Olympus ultra-wide angle 7-14mm lens for MFT systems to the test.

Posted : 7 Jul 2015 3:33PM by Gary Wolstenholme 

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Category	:	Interchangeable Lenses
Product	:	Olympus M.ZUIKO DIGITAL ED 7-14mm f/2.8 PRO
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Handling and Features
Performance
Verdict
Specification


 

This ultra-wide angle zoom lens for Micro Four Thirds (MFT) system cameras provides an angle of view equivalent to a 14-28mm lens used on a 35mm format camera and sports a constant f/2.8 maximum aperture throughout the zoom range. The lens is also dust and splash proof and is available from around £1000 at the time of writing. In this review we'll take a look at how it performs.

Olympus 7-14mm f/2.8 PRO Handling and Features

 

The lens barrel is constructed from high quality, robust materials with a glossy finish and the bayonet is metal with a rubber gasket to prevent the ingress of dust and moisture into the camera body. Despite the robust construction and constant f/2.8 aperture the lens only weighs 534g. This makes the lens an ideal companion for the Panasonic Lumix G6 body used for testing.

Focusing is performed internally, although due to the bulbous front element, necessary to provide such a wide field of view there is no filter thread. Sliding back the focus ring reveals a distance scale and automatically changes the camera to manual focus mode, which is ideal for applying quick adjustments. However, it is quite easy to nudge this by accident when changing lenses, so care needs to be taken to ensure the lens is in the correct mode for shooting. The minimum focus distance is 20cm throughout the zoom range, which is ideal for close ups, or shooting in claustrophobic environments.

 

Olympus 7-14mm f/2.8 PRO Performance

At 12mm sharpness is already outstanding in the centre of the frame and excellent towards the edges. The performance of the lens at this focal length is limited by diffraction, so there is nothing to be gained in sharpness by stopping down.

Zooming to 10mm results in a slight reduction in sharpness at maximum aperture, although performance is still excellent across the frame at maximum aperture. Stopping down to f/4 results in outstanding sharpness in the centre of the frame and excellent clarity towards the edges.

Finally, at 14mm sharpness is very good in the centre and good towards the edges of the frame at maximum aperture. Stopping down to between f/4 and f/5.6 results in excellent clarity in the centre and very good performance towards the edges for this focal length.

MTF@7mm
 

MTF@10mm