25mm "standard" lenses for Micro Four Thirds
- There are a number of 25mm-30mm lenses for Micro Four Thirds system which give the full frame “50mm standard lens” field of view
- in addition, there is the Four Thirds lens - the superb, expensive ($AU1799), heavy (510g+adapter), discontinued Panasonic Leica D 25mm f/1.4 which requires an adapter, has slower CDAF, close focus only 0.38m, 0.5% distortion, 1.1EV vignetting wide open, 62mm filter thread and 78mm long + adapter.
- note the DxOMark scores cannot be compared with full frame systems as different sensors and measurements are used, but a similar table for 50mm full frame lenses on hi res cameras is here, but these at f/1.4 will give you around 1.5EV shallower DOF but note that these high quality f/1.4 50mm full frame lenses are twice the weight and will only close focus down to around 0.45m - the Olympus gets down to twice as close and is much better suited to street photography given the lower weight and size!
- the Panasonic Leica DG 10-25mm f/1.7 lens MFT optical quality can match a 25mm prime lens, so should be factored in as an alternative, especially if you are a Panasonic videographer but it is heavy, large, expensive and has more field curvature than the Olympus f/1.2 lens
comparison of AF lenses
|Olympus mZD 25mm f/1.2||Panasonic Leica DG 25mm f/1.4||Panasonic 25mm f/1.7||Pan 10-25mm f/1.7|
|sharpness wide open||62% accutance centre, 59% at edge||63% accutance centre, 48% at edge||N/A|
|sharpness at f/1.8||78% accutance centre, 60% at edge||73% accutance centre, 54% at edge||63% accutance centre, 54% at edge|
|transmission wide open||T1.8||T1.8||T2|
|vignetting at f/1.8||0.8EV (1.2EV at f/1.4)||0.9EV (1.2EV at f/1.4)||1.4EV|
|lateral CA at edge at f/1.8||8micron||10micron||20micron|
|shallow DOF||2/3 EV better||1/3 EV better||base level||base level|
|AF||fast||issues on Olympus||fast|
|comments||flattest field||poorly designed lens hood; substantial quality variation;||cheap, light, lots of flare, vignetting, not as sharp, best at f/2.8-4||awesome videographer lens|
photo/mftstd.txt · Last modified: 2019/07/09 03:48 by gary1