Metabones Nikon G to Micro Four Thirds Speed Booster ULTRA 0.71x

Metabones Nikon G to Micro Four Thirds Speed Booster ULTRA 0.71x

SKU: MB_SPNFG-M43-BM3

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 Metabones 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 0,71x.

Nikon G to MFT Booster ULTRA 0.71x Features

Industry's best aperture ring covers a 8-stop range, clearly indicating actual number of f-stops. No more guesswork! (Patent pending)
Compatible to both Nikkor G lens &  F lens (include non-AI & AI lens mounts)
Increase maximum aperture by 1 stop
Increase MTF
Makes lens 0.71x wider
Patented 5-element/4-group optical design incorporating ultra-high index tanatalum-based optical glass by Caldwell Photographic in the USA
The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo Clam ball heads

Remark: This mount is manual aperture control. It does NOT support electronic aperture control

Table of compatibility and resulting crop factors