|Canon Mount Adapter EF-EOS M (2012)|
Canon recently launched its own mirrorless camera system with the EOS-M (see Mirrorless Cams > Canon EOS M), which is based on the newly released EOS 650D. As had to be expected, the EOS M did not come with native EF mount. Instead Canon supplies this optional adapter to mount EF and EF-S lenses to the EOS M. The adapter is compatible with all existing lenses (but according to the spec sheet (Canon Germany) not compatible with extenders) and comes with a removable tripod mount.
Technical Specifications: 66.6mm x 28mm, 110g, no optical elements used, feat. 8 electronic contacts
Viltrox came up with a 3rd party alternative in 2013 - the Viltrox Mount Adapter EF-EOS M. The adapter is compatible with EF and EF-S lenses and offers AF and aperture functionality as well as a tripod mount.
Technical Specifications: 66.6mm x 26mm, 119g, no optical elements used, feat. 8 electronic contacts
|Kipon & Co. Canon EF Lens To Sony NEX and Micro 4/3 Electronic Adapters|
Back in 2012 Kipon announced to develop electronic adapters to adapt Canon EF lenses to Sony NEX and Micro 4/3 mirrorless cameras. At the moment no further details are published than that the adapters will support aperture control via camera body.
In the same year at Photokina Roxsen announced the arrival of a "Canon M adapter" as well ("coming soon"). Since Roxsen deals with Kipon, it's most likely the same story.
Viltrox indeed launched their Mount Adapter EF-NEX with electronic couplings (2013). The adapter revives the AF and iris control and offers a build-in 'anti-shaking function' as well as a tripod mount. 8 electronic contacts are presented to the lens.
|Kipon & Co. Canon EF Lens To Sony NEX, Fuji FX and Micro 4/3 Dumb Mounts with Iris|
The already existing dumb mount versions (also available from Fotodiox, Pro-Optic or DSLRKit, just to name a few) comes with built-in adjustable, 14-bladed iris and uses an additional lens element. Even letting alone the additional lens element an iris behind the rear element of the EF mount lens isn't quite the same as an iris in its original position within the lens. Besides other side effects, using an aperture smaller than f/6 will result in vignetting. The adapters are further not compatible with EF-S lenses. Despite not offering links to the Fuji FX mount here it does exist. Try a Google on "Kipon EOS-FX A".
|Kiwi & Co. Canon EF To Sony NEX, Fuji FX and Micro 4/3 Dumb Mounts1|
Dumb is not just a word here. No electronic coupling, not even integrated iris like the Kipons above. Will work perfectly with the Samyangs, otherwise allow for no control beyond manual focus(1).
|Metabones EF - E mount (2012) a.k.a. Conurus Canon EF Lens To Sony NEX Smart Adapter|
Conurus, who were already known for their conversions of Zeiss Contax N lenses to Canon EF mount using Sigma technology, together with Metabones, a company known for high quality adapters, developed an adapter to mount Canon EF lenses to Sony NEX cameras, which was released in 2012. The adapter was tested to work seamlessly with Sony NEX-3, NEX-5, NEX-5N, NEX-7, NEX-C3, NEX-FS100, FS700 and NEX-VG10 (other models are supposed to work as well, though not tested). It supported EF as well as EF-S mount (EF-S might result in some soft vignetting due to differing crop factors of EF-S (1.6x) and NEX (1.5x)). Support for electronic aperture control via camera as well as proper EXIF data from lens was given (aperture values are rounded up / down though, depending on the camera). IS functionality was tested with different lenses and should work with adapter firmwares v1.02 and newer (factory update required for older firmware versions and granted free shipping, but those were only shipped during the first few days after initial release). The IS was powered by the camera. The adapter featured a button to fully open the iris for manual focusing and bright frame preview as well as it offered a tripod screw mount. There was no AF support. E-M lenses worked flawlessly. Metabones published a list of lenses tested with the adapter. The mount was sold for an initial price of 400$.
In the second half of 2012 the adapter was updated to Version II, then featuring a detachable AS-style quick release plate, a round opening with anti-reflection surface and a power saving mode which reduces iris and image stabilization actuation during image preview. AF support was then given for Canon lenses majorly released since 2006* and seemingly a few third-party lenses** as well. The AF performance was not as fast as with Canon D-SLRs. According to Metabones it's slower than EOS M system or Sony NEX with their LA-EA2 adapter (for Sony A mount lenses), but claimed still faster than A mount lenses mounted using the Sony LA-EA1 adapter. For all other lenses the new version will just work like the old one. Version I Conurus adapters could be (factory) upgraded. For the FS100 and FS700 AF will work in Still Mode only, not in Movie Mode. Conurus-Metabones Adapter v1 and v2 review / comparison at EOSHD.com.
In 2013 EF - E Mount Mark III was released by Metabones. Additionally to the above features Mark III supported the NEX VG900 (full frame cam) and seemless switching between EF and EF-S lenses (auto-crop). From this version on, Conurus was no longer mentioned nor did they post updates about the product on their site any longer. Still the mount - including the Speedbooster version - has its own subforum within the Conurus forum structuresm where I also found the following comment: "Conurus has an agreement with Metabones to supply the electronic technology exclusively to Metabones. So, unfortunately Conurus will not be able to sell the electronics to anybody else." (conurus 2013-04-24)
Mark IV followed in 2014. It features refined "internal structure" (coatings, electronics?). Otherwise the features list reads as / appearance looks like before.
Metabones also released an EF - M43 mount in 2014. See Dedicated Lenses > Adapting EF > EF to Micro 4/3 for details.
*These include the Canon EF-S 10-22mm f/3.5-4.5 USM, EF-S 17-55mm f/2.8 IS USM, EF-S 17-85mm f/4.0-5.6 IS USM, EF-S 18-55mm f/3.5-5.6, EF-S 18-55mm f/3.5-5.6 IS, EF 22-55mm f/4.0-5.6 USM (although much older), EF 28-90mm f/4.0-5.6 III, EF 70-200mm f/2.8L IS USM II, EF 70-200mm f/4.0L IS USM, EF 70-300mm f/4.0-5.6L IS USM, EF 70-300mm f/4.0-5.6 IS USM, EF 85mm f/1.2L II USM, EF 100-400mm f/4.5-5.6L IS USM and EF 300mm f/2.8L IS USM.
**Third-party lenses supported are Sigma 17-70mm f/2.8-4.0 DC OS HSM (AF issues still reported at the long zoom end), Tamron 24-70mm f/2.8 Di VC USD and Tokina 11-16mm f/2.8 DX AT-X PRO.
|Metabones Speedbooster EF - E (2013)|
In 2013 Metabones, in coop with Caldwell Photographic (design of the optics), released the Speed Booster in various flavors - including EF - E mount. Speed Booster "[...] increases the aperture by 1 stop (hence its name), increases MTF [resolution] and makes lens wider by a factor of 0.71x." Full electronic control as before, with limited (slow) AF support for Canon only lenses produced since 2006. The adapter comes with detachable Arca Swiss type tripod mount. Yet no full frame NEX support, no EF-S compatibility. The adapter received the TIPA Photo Accessory Award 2013.
Warning: Do NOT use any mount adapters on it before deep-reading the manufacturer's footnotes (physical dangers as well as for electronic shortening).
Alternative: There is a number of so-called Focal Reducers or Lens Turbos available on the market, offering an increase of 1 stop, 0.72x crop and increase of MTF as well. But those are dumb mounts alltogether, and since they are offered by the usual suspects of comparable cheapness and contain optical elements, I wouldn't trust them without testing.
For the Speedbooster optics add another 200$ to the cost of the basic mount version.
|Quenox & Co. Canon EF To Sony NEX and Micro 4/3 Dumb Tilt Mounts1|
Now owning a Canon EOS and probably one of the Samyangs this one might give you one more argument to get a secondary mirrorless body instead of a C/EF T/S lens. These adapters will mount your C/EF lenses and provide an adjustable tilt range of up to 8° at a 360° rotation. For some reason there is no Tilt EOS-FX yet.
|Selected Mirrorless Camera Core Specs Compared:|
|Camera Model||MSRP~||Mount||Color Depth2||Dyn. Range2||HQ ISO2||Crop||DPreview||Availability|
|Canon EOS M||800$ (2012)||EF-M||22.1 bits||11.2 EV||827||1.6||Preview||||
|Fujifilm X-E1||1000$ (2012)||Fuji X||1.5||Review||||
|Fujifilm FinePix X-Pro1||1700$ (2012)||Fuji X||1.5||Review||||
|Sony A5000||500$ (2014)||Sony E||23.8 bits||13.0 EV||1089||1.5|
|Sony NEX-C3||650$ (2011)||Sony E||22.7 bits||12.2 EV||1083||1.5||Review|
|Sony NEX-F3||600$ (2012)||Sony E||22.7 bits||12.3 EV||1114||1.5||Review||||
|Sony NEX-3N||500$ (2013)||Sony E||22.8||12.5||1067||1.5||Preview|
|Sony NEX-5N||860$ (2011)||Sony E||23.6 bits||12.7 EV||1079||1.5||Review||||
|Sony NEX-5T||700$ (2013)||Sony E||23.6 bits||13.0 EV||1015||1.5||Camera Roundup|
|Sony NEX-6||850$ (2012)||Sony E||23.7 bits||13.1 EV||1018||1.5||Review||||
|Sony NEX-7||1720$ (2011)||Sony E||24.1 bits||13.4 EV||1016||1.5||Review||||
|This is just a selection of recent models, that are expected to handle low light conditions nearly as easy as some DSLRs since a few years (ISO ratings above 1000). They all meet or exceed a minimum of 4608 x 3456 pix sensor resolution (15.9 Mpix) and 125 - 16000 ISO range. Noticed the absense of MFT mount cameras? According to available DxO tests there is no MFT camera exceeding the ISO 1000 mark. The best one there is the Oly Pen EP-M2 with a rating of 932.
For reference, the EOS 5D Mark II achieved a 23.7 bit, 11.9 EV, 1815 ISO rating, the 5D Mark III a 24.0 bit, 11.7 EV, 2293 ISO rating (see SLR Cameras > Canon EOS DSLR for more models). Sure, both are (professional) fullframe sensor models and therefore have a huge advantage in lowlight, but that's what you usually will chose to do the shooting as best as possible technically. And seriously, when it comes to high ISO Canon is not even close to beat Sony and Nikon. So the above selection in fact does pretty well compared to Canon's consumer and prosumer APS-C models (70D ratings: 22.5 bit, 11.6 EV, 926 ISO ...), and as you can see, by above named standards for this list the EOS-M would have naturally been deleted for way too bad ISO performance, if this whole page wasn't basically about EOS :(. But hey ... there is always a little grain ready to enter the eye. Do not miss to read Victor Pavlovič's take on Sony NEX.
As an almost final note, it be mentioned, that a) for some reason I currently can't remember, DxO refuses to test Fujifilm cameras and b) as you can see above, there are as of today no smart adapters available to mount EF lenses to Fuji X mount.
Some more random facts:
1) In the FinePix X-Pro1 Review you can look at a side-by-side sample shot comparison for noise levels of different cameras, that you can freely choose from a drop-down list.
2) Nauticam offers UW housings for the Sony NEX-5N, NEX-6 and NEX-7.