The newly released Fujifilm GFX camera has a sensor slightly larger than the standard 35mm full frame sensor. When full frame Canon/Nikon lenses are used with Fujifilm GFX, there is a possibility that serious vignetting may occur, especially for wide angle lenses.
Our patented 5 elements in 4 groups optics system inside the Laowa Magic Format Converter (MFC) can enlarge the image circle of your Canon / Nikon full frame lens and allow it to use with Fujifilm GFX cameras without vignetting.
The aperture dial on Nikon F/G adapter is designed to provide aperture control for Nikon G-type lenses, which do not have an aperture ring. No such feature on Canon mount.
This adapter has no electronics contact which means that the aperture & auto-focusing of Canon AF lenses may not work.
Laowa Magic Format Converter (MFC) is the world’s first Fujifilm GFX adapter with optics for Canon/Nikon Full Frame lenses. The patented optics system inside the MFC will enlarge the image circle of any full frame lenses and fit it onto the relatively larger sensors of Fujifilm GFX systems. It has a focal length multiplier of 1.4x and reduces the maximum aperture by 1-stop.
The Laowa Magic Format Converter (MFC) is different from the simple GFX adapter existing in the market. The GFX adapter currently available in the market simply adapts the Canon/Nikon lenses onto the Fujifilm G-mount body with no resizing on the image circle. However, due to the relatively smaller image circle of Canon/Nikon full frame lenses, most of the them are not able to completely fill the Fujifilm GFX sensors, resulting in a vignetting (Dark Corners) or heavily degraded peripheral sharpness in the images.
Our Magic Format Converter (MFC) took advantage of the short flange distance of mirrorless cameras and incorporated a patented optics system to expand the image circle of the lens without compromising the image quality. The enlarged image also corrects the vignetting and maintains the optical performance of your lens in the medium format system.
The Magic Format Converter (MFC) is particularly useful for ultra-wide angle lenses. Vignetting tends to be stronger when we adapt an ultra-wide angle full frame lenses onto the GFX sensors. By using the MFC, GFX users will be able to enjoy an ultra-wide angle of view without the need to crop away all unusable corners of the images. When the MFC is used with our Laowa 12mm f/2.8 Zero-D lens, it will become a roughly 17mm f/4 lens in GFX-50S/50R/100 cameras. The angle of view will be around 116° (equivalent to appr. 13mm lens in 35mm format), making it one of the widest lens available for the GFX system. The MFC opens up a lot more ultra-wide angle lens options for the new Fujifilm GFX camera and increases the compatibility of full frame lenses to the Medium Format cameras.
Magic Format Converter (MFC)
5 elements in 4 groups
Focal Length Multiplier
Increase by 1.4x
Reduce by 1-stop
Focus Mode / Aperture Control
69.6 x 44.1mm
Canon EF to Fujifilm GFX / Nikon F/G to Fujifilm GFX