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FUSION Smart AF Adapter - Canon EF to Sony E-Mount
This FUSION adapter translates the Canon and Sony camera language for each other so that
they can communicate allowing you to use Canon lenses on the Sony E-Mount cameras with
auto focus and iris control. But much like a joke or parable from one language told in another,
not everything always translates properly. So here are some things to keep in mind when using
the Canon to Sony FUSION adapter:
Only Canon-branded lenses introduced in or after 2006 are officially supported.
Autofocus may be disabled for older Canon lenses and most third-party lenses (including
most Sigma, Tamron and Tokina lenses).
Lens compatibility is designed to work best on Sony a7, a7R, a7S, a7 II a7R II E-Mount
cameras
Auto Focus can be slow or even not function with varied model lenses and even different
lenses of same model (check chart below)
Continuous AF and video AF are not supported as performance may be unsatisfactory.
The first two autofocus attempts are used to calibrate the lens and as a result may not lock
successfully on the target.
Half-press the shutter release button again and autofocus will lock successfully.
Autofocus may have difficultly locking onto subjects which are very close to the nearest
focusing distance of the lens.
Autofocus accuracy depends heavily on the design and working condition of the lens.
Lenses with hidden problems which may not be apparent on Canon DSLRs will lead to
inaccurate and unreliable autofocus on Sony E-Mount cameras. Typical problems of this
kind that we have seen include an rough/erratic autofocus mechanism (e.g. getting stuck
intermittently at a certain focusing distance), a faulty/worn-out distance encoder or other
faulty/worn-out internal sensors.
By default Sony cameras have 1/3 stops, however F1.2 is a half stop, so when that lens is
wide open, F1.3 is displayed even though you’re actually shooting at F1.2, but if you
really need the metadata and camera it to say 1.2 instead, you can set the camera to do so
by setting the the EV dial on the camera to zero, then change this setting: Menu > Camera
Settings > Exposure Step > 0.5 EV
We don't want to scare you off from using the FUSION adapter, more often than not there are
no problems with using the adapter; but every now you may come across one of the above issues.
Hopefully knowing and understanding what the product does and what some of the possible
drawbacks are before using the adapter will make it a more enjoyable experience from the start.
FUSION Smart AF Lens Mount Adapter Compatibility Chart
***NOTE*** Just because a lens is listed here does not mean the the results will be the same,
Lenses do get firmware upgrades and things change with the same model lenses, so results will
vary depending on what version of that lens you have. So this is a guide more then exact results.
Canon Zooming Lens
Canon Fixed Focal Lens
Sigma, Tamron,etc
EF 8-15/4L USM fisheye
EF 100/2.8 USM macro
Sigma DC
17-70/2.8-4 DC OS HSM
EF 17-40/4L USM
EF 135/2L USM
Sigma DC
30/1.4 DC HSM
EF 70-200/2.8L IS USM
II
EF 200/2.8L II USM
Tamron
SP 24-70/2.8 Di VC USD
EF 70-200/4L USM
EF 300/2.8L IS USM
Tamron
SP 70-200/2.8 Di VC
EF 70-200/4L IS USM
Extender EF 1.4x III
EF 20-35/2.8L (Ver.18)
EF 14/2.8L II USM
EF 22-55/4-5.6 USM
EF 24/1.4L II USM
EF 24-70/2.8L USM II
EF 24/2.8 IS USM
EF 28-80/3.5-5.6 II
EF 35/1.4L USM
EF 28-90/4-5.6 III
EF 50/1.2L USM
EF 35-350/3.5-5.6L
EF 50MM 1.8II
EF 70-300/4-5.6L IS
USM
EF 85/1.2L II USM
EF 70-300/4-5.6 IS USM
EF 85/1.8 USM
EF100-300/5.6
Extender EF 2x (mark I)
(non-L,not USM, push-
pull zoom ) (Ver.18)
EF 100-400/4.5-5.6L IS
USM
EF-S 60/2.8 EF-S 60/2.8
maco USM
EF-S 10-22/3.5-4.5 USM
EF-S 17-55/2.8 IS USM
EF-S 17-85/4-5.6 IS USM
EF-S 18-55/3.5-5.6
EF-S 18-55/3.5-5.6 IS
EF-S 18-135/3.5-5.6 IS
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