Laowa Magic Format Converter (MFC), the World’s First Fujifilm GFX Adapter With Optics for Canon/Nikon Full Frame Lenses

by planetMitch3 Comments

This is fascinating to me – if it works, it could be a real boon to using Canon glass on the Fuji GFX

Venus Optics Announces the World’s First Lens Adapter Which Can Enlarge the Image Circle of Full Frame Lenses for Using on Fujifilm GFX-50S

Via Venus Optics Press:

Anhui China, May 23, 2017 – Venus Optics, the camera lenses manufacturer who had previously launched a number of unique Laowa camera lenses, is proud to announce the Laowa Magic Format Converter (MFC), 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 Fujifilm GFX- 50s camera sensors. 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. 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.

The 2nd member of the Laowa Magic Converters line-up

The Magic Format Converter is the second member of the Laowa Magic Converter line-up. Venus Optics had announced the Magic Shift Converter (MSC) last year and the MSC shares the same patented optics system as the MFC. The MSC can expand the image circle of full frame lens and convert the lens into a shift lens for using in the Sony Full Frame E-mount cameras. The MSC is expected to be ready to ship in June.

Principles of the Magic Format Converter

The Laowa Magic Format Converter (MFC) will come with 2 variants, Canon EF to Fujifilm G & Nikon AI to Fujifilm G. They are expected to start shipping in July 2017. Pricing will be announced later. More sample images in RAW and JPEG format can be found in the dedicated page of our official website.

Laowa Magic Format Converter (MFC)

(cover photo credit: snap from Venus Optics Press)


  1. I don’t understand why you would want to do this. It it is an optical regression. You would loose all the benefits of a medium format sensor and MF glass, the tighter depth of field, the sensor “seeing” more of the scene (less optical distortion as wider lenses are not needed as much). Honestly if you cant afford MF glass for your GFX then there is no point in buying one. f you love your Canon lenses and have a lot of them, then just get a Canon 5Ds and there is no need for an adapter, nor will you be putting an extra glass element in front of your canon glass. This just seems useless to me. Going from a smaller sensor that can utilize all of the full frame lens is great, going the other way, reducing your sensor size to full frame, well I just don’t see it.

  2. The shallow depth of field will be maintained, FL is FL. Moreover, MF is not all about shallow DOF.

    What IS key is that one instantly has access to an array of focal lengths currently unavailable in the Fuji inventory.
    E.G. the Canon 17 TS-E becomes a 24 mm TS-E on the GFX with an angle of view similar to the 17 on FF. THAT is radical as that lens does not currently exist in MF except with the 23 Digitar f5.6 on a a small technical camera. That solution is a bulky, expensive, and slow pain.
    How about the 70-200 zoom? Splendid option for portraiture.

    1. You may be right about the depth of field, and certainly lens choice options is clearly much greater with canon then native GFX lenses, but that still supports my original question as to what is the point of getting a GFX then.
      The real decision maker will be to actually see some side by side comparisons. not only with DoF but with sharpness in regards to the GFX with native glass vs adapter and canon glass and also the GFX with an adapter and then the same lens on the Canon 5ds. I personally have not seen much difference at all in regards to MF characteristics of the GFX as compared to 35mm full frame (and a fast lens), Get me a 6×7 full frame sensor then that would be a huge difference i think.
      A lens that i would love to have, which I always had for my MF cameras was a Leaf shutter lens, if I could get that for 35mm then at present I can not see the benefit of going to MF digital at current sensor sizes. Mind you I haven’t tried the GFX and the last MF camera I shot with was the Pentax 67, so what do I know. 😉

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