Introduction to Olympus M.Zuiko Digital ED 12-40mm F2.8 Lens

The M.Zuiko Digital ED 12-40mm F2.8 is the first lens in Olympus's 'PRO' lens line for Micro Four Thirds, and deliberated to match the top end OM-D E-M1 and supports a constant f/2.8 maximum aperture throughout the zoom range. It offers a 24-80mm equivalent range and also dust and freeze proof. The lens barrel is made from brilliant quality plastics, with a shiny finish and bayonet is metal with a rubber gasket to avoid the entrance of dust and moisture into the camera body. In so far as size and handling is concerned this lens is an ideal match for the Panasonic Lumix G6 camera body. Special elements and coatings 1 spherical element, 1 dual-sided spherical element, 2 ED glass elements, 2 HR glass elements, 1 EDA glass element, 1 HD glass element.

Performance:

The 12mm sharpness is already exceptional across the frame, and there is only a minor perfection in clarity when stopped down one stop. This outline is frequent at 18mm with brilliant sharpness being achieved between maximum aperture and f/8. Zooming to 40mm results in a minor reduction in sharpness at maximum aperture, even then performance is very good in the centre of the frame and good towards the edges of the frame at f/2.8.

This lens appears to be mainly affected by diffraction at small aperture settings, with a dramatic decrease in sharpness is visible at f/22. Though this may not be an issue for several, those wishing to use small apertures for longer exposures, might want to use a impartial density filter as an alternative so that the lens can be kept closer to its optimum aperture range.

Chromatic aberrations are fine controlled during the zoom range. Between 12mm and 18mm limit only exceeds half a pixel width when stopped down between f/11 and f/22. At 40mm fringing just exceeds three quarters of a pixel width towards the edges of the frame at f/2.8, but even so, this low level should be difficult to spot.

This lens gives wonderful sharpness through much of the zoom range at maximum aperture and supports a strong, dust and splash proof assemble, all though remaining compact and lightweight. The brilliant performance of this lens will surely win it many fans that are for sure.

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Features:

·         Lens type                               Zoom lens

·         Focal length                          12–40 mm        

·         Image stabilization                No     

·         Lens mounts                          Micro Four Thirds         

·         Maximum apertur                 F2.8  

·         Minimum aperture                F22                   

·         Aperture notes                      Circular diaphragm                    

·         Minimum focus                    0.20 m (7.87″)              

·         Max. Magnification              0.3× 

·         Autofocus                             Yes    

·         Motor type                            Stepper motor

·         Full time manua                    Yes

·         Focus method                        Internal

·         Focus notes                           Manual Focus Clutch mechanism

·         Distance scale                       Yes

·         Weight                                   382 g

·         Diameter                               70 mm (2.75″)

·         Length                                   84 mm (3.31″)

·         Filter thread                           62.0 mm         

·         Hood supplied                       Yes   

·         Hood product code                LH66