Metabones SPEF-E-BT3 Canon EF to Sony E lens mount adapter

Canon EF lens adapter to Sony E camera mount, advanced 5-element, 4-group optical design incorporating ultra-high index tantalum-based optical glass for optical performance with improved corner sharpness, distortion and reduced vignetting.

It has a magnification of 0.71x, effectively reducing the cropping factor of non-mirror cameras with DX-size sensors such as Sony E-mount and Fuji X-mount cameras from 1.5x to 1.07x.  It is well corrected for use with virtually all full frame SLR lenses, regardless of exit pupil distance. Thus, it works very well with professional-quality f/2.8 zoom lenses, such as Canon's and Nikon's 24-70 mm f/2.8 and 70-200 mm f/2.8 zooms, to produce high-speed zooms of 17-50 mm f/2.0 and 50-142 mm f/2.0, respectively.  Similarly, high-speed fixed focal length lenses, such as a 50mm f/1.2 lens, will be transformed into a 35.5mm f/0.9 lens with excellent contrast and resolution from the center to the edges of the image.

Robust construction and professional finish. Both the camera side and the lens side of the adapter are made of precisely machined, chrome-plated brass. Precise fit and solid connection with no slack, holes or jolts in the lens when mounted on the adapter and no adjustments are required to adapt it to your lens. Designed to achieve infinite focus while maintaining the correct registration distance needed to maintain the optical quality of CRC lenses or floating element lenses.

  
Metabones SPEF-E-BT3 adapter features

• Advanced 5-element/4-group optical design incorporating ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA
• New positive-lock EF lens mount
• Store EXIF data (lens name, focal length and maximum/minimum aperture) for up to 2 manual lenses in the adapter
• If both your lens supports optical image stabilization (OIS) and your camera supports sensor-shift, in-body image stabilization (IBIS), the choice is yours on which one to use, or have both of them work in harmony
• Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lenses
• Custom function button (called Focus Hold button) assignable to more than 50 functions, such as Aperture Preview and Eye-AF, on A9, A7 series, A6500 and A6300
• Dedicated switch controls in-body image stabilization (IBIS) on Sony cameras equipped with SteadyShot INSIDE
• Compatible with Sony FS7 Mark II camera
• Cinema EOS lens (CN-E) support, including power zoom, AF and auto iris
• Rubber gasket protects E-mount connection from dust and moisture
• Detachable tripod foot, compatible with Arca Swiss, Markins and Photo Clam ball heads
    
• Optical/Mechanical
  • Increase maximum aperture by 1 stop
  • Increase MTF
  • Makes lens 0.71x wider
  • Felt material flocked inside to reduce internal reflection
      
• Electronic
  • AF-C tracking during high-speed drive at up to 10fps on Sony A9
  • Fast contrast-detection AF on all E-mount cameras (except AF-S/DMF with Sony A9)
  • Pure phase-detection autofocus support on A9, A7RII, A7II, A6500 and A6300 (the fastest)
  • Supports 5-axis in-body image stabilization of A7II, A7RII and A7SII. (Distance information from lens required; 3-axis IBIS if lens does not transmit distance information.)
  • Powered by camera body. No external power source required
  • LED indicator shows operation mode, OIS (optical image stabilization) activity and communication status
  • Efficient switched-mode power supply
  • Supports image stabilization (IS) lenses
  • Supports electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
  • EXIF support (focal length, aperture, lens name)
  • Distance and zoom display on VG and FS series camcorders, A9, A7 series, A6500 and A6300 (lens with distance information support required)
  • Auto magnify (lens with distance information support required)
  • Auto "APS-C Size Capture" on full-frame cameras