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Metabones Contax Yashica CY to Micro FourThirds Speed Booster ULTRA 0.71x CINE (MB_SPCY-m43-BM4)
Features:
- 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).
- The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.
The following lens(es) have a protruding rear element and may not be compatible with or may require modification to fit the Speed Booster:
- Distagon T* 3,5/15
This adapter is a mechanical adapter. It does NOT support electronic aperture control, AF and EXIF.
Description
Speed Booster ULTRA for Micro Four Thirds
Always Enhance and Never Degrade the Performance of the Attached Master Lens
Like the ULTRA series for Sony E-mount, the new Speed Booster ULTRA m43 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 fullframe 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. Even the latest generation of ultra-high performance SLR lenses such as the Zeiss Otus series can be improved by adding a Speed Booster ULTRA m43.
| Type of Product | Adapters for lens |
| Lens mount | Canon EF |
| Lens Format Coverage | APS-C |
| Focus Type | Manual Focus |
| Adapter type | speed booster |
| Adapter is for cameras | micro 4/3 |
| Adapter is for lenses | citai |
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