Do you need a standard focal length for your Micro Four Thirds camera? Yongnuo has just announced the Yongnuo 25mm f/1.7 ASPH lens for the Micro Four Thirds mount. This new lens contains an aspherical element, which makes lenses more effective in how they manage light and aberrations.
This is the first time that Yongnuo has produced an ASPH lens. This means that it should be better at handling chromatic aberration, which is the color fringing that can appear in the high contrast areas of an image.
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As reported by Photo Rumors, the minimum focus distance of this lens is 20cm, which will give the user plenty of flexibility when it comes to shooting their subject, enabling a shallower depth of field and a closer view. The fact that you can get so close to your subject could also help you produce some macro images - although the maximum reproduction ratio available with the lens is only 1:5.
Interestingly, Panasonic does currently produce a 25mm f/1.7 ASPH lens for Micro Four Thirds cameras, which is smaller (and possibly lighter) than the Yongnuo option. While no pricing information has yet been released for the Yongnuo lens, we assume that this is where the lens will prove competitive, as most of Yonguo's lenses are far less expensive than competing alternatives.
Key specifications
- For Micro 4/3 system
- Maximum aperture: f/1.7
- Minimum aperture: f/22
- Focal length: 25mm
- Minimum focus distance: 20cm
- Maximum magnification ratio 1: 5
- Optical design: 7 elements in 6 groups, the design includes 2 ED elements and 1 aspherical element
- Automatic focusing by STM motor (focus stepping motor)
- Aperture: 7 rounded blades
- AF / MF focus mode switch
- Filter Diameter: 52mm
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