There is a new MS Optics Petz 57mm f/2 FMC lens for Leica M-mount by Miyazaki San. This is a classic Petzval style lens with a classic bokeh (4 lenses in 4 groups). Here are the details:
History
The Petzval portrait lens was developed in 1840 by Petzval and Voigtländer. With a maximum aperture of f3.6, it was 20 times brighter than Chevalier’s f11 lens of the same period. Both resolution and contrast were excellent from maximum aperture. Its weak points were field curvature and uncorrected astigmatism. The lens corresponded to about a 180mm – 200mm Leica mount telephoto lens. Besides that, it was commonly said that the lens was unusable because of its harsh swirly bokeh.
Tech Specs
- Improved type Petzval lens
- Four elements in four groups, focal length 57.3 mm, max. aperture f2.05
- All eight surfaces multicoated, 97.5% transmission
- Filter and hood thread size 40.5 mm
- Size: diameter 37 mm, length 37 mm, weight 110 grams
- Focus: infinity to 0.8 meter
Performance
Per Miyazaki’s press release, the concept for the Petz 57/2 :
- High performance in the center while retaining beautiful smooth bokeh at the frame edge
- Easy to use standard focal length slightly longer than normal
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