Sharper corners, less distortion, and reduced vignetting. Those are selling points for the newly announced Metabones Speedbooster Ultra, which does everything the original Speedbooster is known for, but improves on it in a number of ways.


The new Speedbooster Ultra features a new 5 element/4 group design that improves sharpness across the frame (but especially in the corners), as well as reducing both the distortion and vignetting that was experienced in previous Speedbooster versions. The Ultra features ultra-high index tanatalum-based optical glass, which is of the highest quality.

Metabones Speedbooster Ultra Features

  • Increase maximum aperture by 1 stop.
  • Increase MTF.
  • Makes lens 0.71x wider.
  • Advanced 5-element/4-group optical design incorporating ultra-high index tanatalum-based optical glass by Caldwell Photographic in the USA (patent pending).
  • Electronic integration of aperture diaphragm, controlled by or from the camera body.
  • Partial autofocus support for late-model (post-2006) Canon-brand lenses.
  • Powered by camera body. No external power source required.
  • High performance 32-bit processor and efficient switched-mode power supply.
  • The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads.


This new Speedbooster Ultra is now available for pre-order over at B&H in just about every mount conversion you could want, including Canon EF to E and Nikon G to E. Price ranges from $449 to $649 depending on the mount conversion that you want to make.

If you would like to learn more about the Speedbooster Ultra, you can head on over to the Metabones website and check out their full press release which lists all the tech specs you could ask for as well as a list of compatible lenses.


What are your thoughts on these new Speedbooster Ultra units? Do you think the improvements are worth upgrading to from the original Speedbooster units? Leave a comment below!