MB_SPEF-X-BT1
Refurbished
Metabones Canon EF Lens to Fuji X mount T Speed Booster ULTRA 0.71x, Metabones Canon EF Lens to Fuji X Mount T Speed Booster ULTRA 0.71x (p/n MB_SPEF-X-BT1 ). Sharper corners, less distortion, reduced vignetting Optical design: advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance
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Metabones Canon EF Lens to Fuji X mount T Speed Booster ULTRA 0.71x
Metabones Canon EF Lens to Fuji X mount T Speed Booster ULTRA 0.71x, Metabones Canon EF Lens to Fuji X Mount T Speed Booster ULTRA 0.71x (p/n MB_SPEF-X-BT1 ). Sharper corners, less distortion, reduced vignetting Optical design: advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance
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Key Features
Optical
Electronic
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Description
Speed Booster® ULTRA for X-mount, E-mount, EF-M mount and RF-mount cameras
Sharper corners, less distortion, reduced vignetting
Optical design: advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass to achieve extraordinary optical performance with improved corner sharpness, distortion and reduced vignetting.
Like the revolutionary original Metabones Speed Booster® announced in January 2013, the Speed Booster ULTRA has a magnification of 0.71x, and so it effectively reduces the crop factor of mirrorless cameras with DX-sized sensors(APS-C), such as Sony E-mount and Fuji X-mount cameras, from 1.5x to 1.07x. However, the new ULTRA design makes very effective use of exotic materials at the furthest limit of glassmaking technology, and as a result is well corrected for use with virtually all full-frame SLR lenses regardless of exit pupil distance. Thus, the Speed Booster ULTRA performs extremely well with professional-grade f/2.8 zoom lenses such as the 24-70mm f/2.8 and 70-200mm f/2.8 zooms by Canon and Nikon to produce 17-50mm f/2.0 and 50-142mm f/2.0 high-speed zooms, respectively. Similarly, high-speed fixed focal length lenses such as a 50mm f/1.2 will be transformed into a 35.5mm f/0.9 lens with excellent contrast and resolution from the center all the way to the edges of the image. (More information can be found in the press release here)
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* IBIS is supported only with fixed focal length lenses at or below 100mm (after multiplying by 0.7x in the case of Speed Booster ULTRA). OIS will override IBIS. You cannot combine them. |
Note :
Slow lenses will report boosted apertures to the camera body but fast lenses will report pre-boost apertures. We won't show f/0.9 with a f/1.2 lens attached, but show f/1.2 instead.
Example:
a) EF 85/1.2L attached, camera display = f/1.2, physical aperture (lens + Speed Booster® combined) = f/0.85.
b) Sigma 35/1.4 attached, camera display = f/1.0, physical aperture (lens + Speed Booster® combined) = f/1.0.
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