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Cambo’s New Adapter Will Mount EF Lenses On the Fuji GFX 50s | But, Would You Really Want To?

By Justin Heyes on March 27th 2017

Without a doubt, the lenses designed for Canon’s EOS mount are the most adaptable due to their fully electronic nature. According to Canon, manufacturers such as Sigma, Tokina, Tamron and others, are not “licensed” to produce lenses and are “reverse-engineered” to fit and operate on EOS camera bodies.


Even popular adapters like Metabones have a disclaimer on their products that they are “licensed, approved or endorsed by Canon”, but that doesn’t stop photographers from using them on the favorite bodies, like the Sony A7R II or the Panasonic GH4. Recently Cambo, a Dutch accessory manufacturer, has announced that it will produce an adapter to allow full-frame Canon EF lenses to work with the Fujifilm GFX 50s, dubbed the CA-GFX.

When released, the CA-GFX will sit between the camera body and the EF lens, but no data will be transmitted to the camera, this includes EXIF, autofocus, and aperture. The adapter will offer its own control dial for adjusting aperture with a small LCD on the side showing the selected f-stop.

In their press release, Cambo says the adapter was designed with the Canon 17mm T-SE and 24mm T-SE tilt-shift lenses in mind as they have large enough image circles that can cover the 43.8 x 32.9mm sensor of the GFX 50s. There was no mention other Canon lenses, but vignetting should be expected to a certain extent depending on the focal length used.

The announcement joins the new Cambo ACTUS unit that was released earlier this month. The ACTUS-GFX, as it is being called, is a bellows-and-non-rail unit that allows tilt, shift and swing movements in the front standards; along with a 27mm vertical and 40mm horizontal movement at the rear. The bellows unit will allow a large range of medium and large format lenses via adapters. The ACTUS-GFX costs $2795 in the US and no price has been released for the CA-GFX as of yet.


The CA-GFX might be the first “smart” adapter for Canon EF lenses for the GFX system, but as Bing pointed out when Fotodiox released their adapters, the laws of physics still apply. Adapters like this are nonsensical.


Companies like Cambo might be filling the void of lenses that Fuji has yet to provide/announce, namely anything faster than f2, at the cost of extremely soft corners and edges. If you wanted a camera that could shoot 50MP with a lens faster than f2 – say at f1.2 – that has a Canon EF mount, it would be more cost effective to get the Canon 5DS R with the EF 50mm f1.2L. Not only would you have a lighter camera you would be saving $1600 over the Fuji.

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Justin Heyes wants to live in a world where we have near misses and absolute hits; great love and small disasters. Starting his career as a gaffer, he has done work for QVC and The Rachel Ray Show, but quickly fell in love with photography. When he’s not building arcade machines, you can find him at local flea markets or attending car shows.

Explore his photographic endeavors here.

Website: Justin Heyes
Instagram: @jheyesphoto

Q&A Discussions

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  1. Rob Thompson

    Justin: “If you want to spend $6500+ to shoot an equivalent f1.6 that is you prerogative.”

    Are you serious? That’s how you correlate price and value? On the lowest f stop?

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  2. Steve Hendrix

    To be at least a bit more accurate than “Dutch Accessory Manufacturer”, Cambo – since 1946 – is a manufacturer of Studio Camera Stands, View Cameras, Technical Shift Cameras, and Repro Cameras, Tables and Columns. They do also indeed manufacture accessories for these and other products.

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  3. Steve Hendrix

    [Steve Hendrix has deleted this comment]

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  4. Rob Thompson

    Nonsensical? Didn’t you write an article about how Fujifilm “failed” with the GFX? Really enjoyed the comments on that one.  I bet Fotodiox is selling quite a few adaptors, and the price of used MF lenses has jumped a bit lately, so once again, it appears you’ve gone into the “clickbait” zone with the “would you really want to” title.   And how many MF lenses are there (currently) that are less than F2? There’s the Mamiya 80mm F1.9,  and who could forget the Pentax Zoomatar 240mm F1.2 (good luck finding one). I wouldn’t expect many below F2, as really fast MF lenses are even more expensive and bigger than most would want. If the math is correct, an F2 MF lens on the GFX would be equivalent to an F1.6 on 35mm…should be fast enough to satisfy anyone’s bokeh deficiency.

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    • Justin Heyes

      It is nonsensical as the corners and edges will not be sharp. Even if the image circle will cover the sensor, you will have better results on a full frame camera.

      The whole point of a medium format camera is to achieve better subject isolation with the larger format. On the GFX than you can get shallower DOF than on the full frame.

      Fuji’s lens lineup is lack luster with two f2.8 lenses, one f2 lens, and a handful of f4 lenses.Taking into account the reverse crop factor the lenses equate to f2.2, f1.6, and f3.2 in full-frame terms. Shooting with the Canon 5DSR with the EF 50mm f1.2 will give you better bokeh at a lower price point.

      Older medium format lenses like the Mamiya 80mm f1.9 are meant for a larger frame, in the Mamiya’s case, it is the 645 format. When converted to full frame is the equivalent to a 50mm f0.73

      Without faster lenses, there is no reason to get excited about the medium format nature of GFX – subject isolation and the much-loved bokeh are not there. 

      If you want to spend $6500+ to shoot an equivalent f1.6 that is you prerogative. For me, I will be happy to shoot on my D750 with Nikon 85mm f1.8 (achieving similar results) and invest the $4K difference on something else.

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  5. Stefan Moore

    Hmm..  they announced a 110mm F/2 the moment they anounced the gfx.. 

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