Olympus M.Zuiko Digital ED 8 mm f/1.8 Fisheye Pro

Olympus M.Zuiko Digital ED 8 mm f/1.8 Fisheye Pro is an optically corrected fisheye lens.

Olympus M.Zuiko Digital ED 8 mm f/1.8 Fisheye Pro
MakerOlympus
Lens mount(s)Micro Four Thirds
Technical data
Typefisheye
Focus drivestepper
Focal length8 mm
Focal length (35mm equiv.)16 mm
Crop factor2
Aperture (max/min)f/1.8 / f/22
Close focus distance0.12 m
Max. magnification0.2
Diaphragm blades7, circular
Construction17 elements in 15 groups
Features
Ultrasonic motor Yes
Weather-sealing Yes
Lens-based stabilization No
Macro capable Yes
Unique featuresaspheric, very fast
Applicationpanorama
Physical
Max. length80 mm
Diameter62 mm
Weight315 g
Accessories
Lens hoodintegrated
History
Introduction2015

Description

M.Zuiko Digital lenses are offered as exchangeable lenses for the Micro Four Thirds system (MFT). The ED 8 mm f/1.8 Fisheye Pro is available since 2014. This lens has a focussing ring and it is water and dust proof.

The anti-reflective coating of the lens with 0.3 times normal focal length has 17 lenses in 15 groups. The front lens is made of extremely high refracting glass in order to allow a small construction.[1] The ED 8 mm f/1.8 Fisheye Pro has an excellent image quality with low aberration.[2] At fast aperture sizes (up to f = 2.8) there is visible vignetting.[3]

Due to the large aperture size the lens is suitable for night sky and together with an underwater lens port for underwater photography. Furthermore, it is qualified for architecture and nature photography[4] Because of the short close focus disdance it can be used for macro shots.[1]

Comparison

Compared to other camera systems with differing normal focal lengths, and therefore different image sensor sizes, the following equivalent values apply to lenses with appropriate properties as the M.Zuiko 8 mm f/1,8 within the Micro-Four-Thirds system (MFT). With the parameters given in the table in all camera systems the photographer will get the same angle of view, depth of field, diffraction limitation and motion blur:

Image sensor format Focal lengths at the
same angle of view
(diagonal angle ≈ 29°)		 F-number at the
same depth of field		 ISO speed at the
same exposure time
Nikon CX5.5 mm1.2100
MFT8 mm1.8200
APS-C11 mm2.4360
Full frame16 mm3.5800

References
  1. M.ZUIKO DIGITAL ED 8 mm F1.8 Fisheye Pro - The world's first f1.8 high-performance fisheye lens Archived 2016-11-17 at the Wayback Machine, olympus-global.com, 12 May 2015, retrieved 12 November 2016
  2. Andrew Alexander: Olympus 8 mm f/1.8 Pro M.Zuiko Digital ED FisheyeTweet, 29 May 2015, retrieved 12 November 2016
  3. Gordon Laing: Olympus 8 mm f1.8 Fisheye verdict, cameralabs.com, June 2015, retrieved 12 November 2016
  4. Development of M.ZUIKO PRO category interchangeable lens - M.ZUIKO DIGITAL ED 8mm f1.8 Fisheye PRO, olympus-global.com, 5 February 2015, retrieved 12 November 2016
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