Metabones Contax Yashica CY to Micro FourThirds Speed Booster ULTRA 0.71x CINE
- Increase maximum aperture by 1 stop.
- Increase MTF.
- Makes lens 0.71x wider.
- Positive-lock CY lens mount, the robust cine-style positive locking mechanism to ensure that no play when attaching the vintage lenses ;
- Optics designed by Caldwell Photographic in the USA (patent granted).
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- Product: #81307
- SKU: MB_SPCY-m43-BM4
Like the ULTRA series for Sony E-mount, the new Metabones Contax Yashica CY to Micro FourThirds Speed Booster ULTRA 0.71x CINE uses an advanced 5-element 4-group optical design incorporating ultra-high index tantalum-based optical glass. However, the new design is specifically optimized for the Micro Four Thirds sensor and filter stack, and as a result achieves an astonishing level of performance that sets a new standard for focal reducers.
Like the revolutionary original Metabones Speed Booster® announced in January 2013, the Speed Booster ULTRA m43 has a magnification of 0.71x, and so it effectively reduces the crop factor of mirrorless Micro Four Thirds mount cameras from 2.0x to 1.4x. However, the new ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is almost perfectly corrected for use with all full frame SLR lenses regardless of aperture. The Speed Booster ULTRA m43 will also work extremely well with many DX and APS-C format lenses provided the image circle of the lens is large enough. Optical performance of the new Speed Boosters is so good that the MTF of any lens attached to it will be improved.