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The T Smart Adapter for Canon EF or Canon EF-S Mount Lens to Select Micro Four Thirds-Mount Cameras from Metabones allows a Canon EF or EF-S mount lens to be mounted onto a Micro Four Thirds-mount camera. While doing so, the adapter is designed to support electronic communication between an attached camera and lens. If the lens includes autofocus, image stabilization, as well as camera-controlled aperture functions, this adapter is intended to allow those features to be used. If an attached lens is also capable of generating EXIF metadata when used with a directly compatible camera, the T Smart Adapter is designed to allow that information to be saved along with image files generated with a combination of the lens, a Micro Four Thirds-mount camera, and the adapter.
By enabling camera-controlled aperture functions for a Canon EF or Canon EF-S Mount Lens when used with a Micro Four Thirds-mount camera, program, shutter-priority, aperture-priority, as well as manual modes can be set and used through the camera. Power for these functions is transferred from the camera to the lens, and when manual focusing is preferred with a compatible electronic lens and a Panasonic camera, an integrated jog dial that allows incremental aperture adjustment can be depressed to open the lens's aperture diaphragm to its largest setting. The resulting shallow depth-of-field can then be used to help ensure focus accuracy.
When an image is taken with the T Smart Adapter, a matte black internal coating minimizes the potential for reflections within the adapter barrel, which could otherwise result in unwanted glare within the image.
The T Smart Adapter is constructed from aluminum alloy for durability while minimizing weight. Its mounting rings are made with brass to further prevent wear-and-tear, and a detachable tripod foot is included that features 3/8" threads as well as compatibility with Arca-Swiss tripod heads.
While the T Smart Adapter allows a Canon EF or EF-S mount lens to be mounted onto any Micro Four Thirds-mount camera, any functions that involve electronic communication currently require a Panasonic-brand Micro Four Thirds-mount camera.
Allows a Canon EF or EF-S mount lens to be used with a Micro Four Thirds-mount camera
Allows third-party, full-frame or APS-C EF-mount lenses to be used with a Micro Four Thirds-mount camera
Supports electronic communication between camera and lens to enable autofocus, image stabilization, on-camera aperture control, and EXIF metadata generation when possible
Internal coating minimizes reflections within the adapter barrel
Integrated jog dial for incremental aperture adjustment and push-button access to lens's widest aperture setting when used with a compatible Panasonic camera
Detachable, Arca-Swiss compatible tripod foot with 3/8" threads
Aluminum-alloy components for weight reduction
Brass mounting rings further prevent wear-and-tear
Locking mechanism for secure attachment of lens with push-button release
Autofocus Lens Compatibility List
The following table lists lenses which has been tested. Other lenses not listed here typically works well, too.
Tested by the community, thanks!
Accurate only on newer cameras such as Panasonic G7 and GX8
Canon EF 8-15mm f/4L USM Fisheye
Canon EF 70-200mm f/2.8L IS USM (Mark I)
Canon EF 70-200mm f/4L USM (non-IS)
Canon EF 50mm f/1.8 II
Manual focus only
Contax N lenses modified by Conurus
Focus confirmation "chips"
Some improperly-made M42 screw mount adapters may short the electronic contacts of the Speed Booster and cause damage to the Speed Booster and/or camera body.
Focus confirmation "chips" such as Dandelion are incompatible.
Many manual focus lenses (e.g. OM 28/2.8, OM 50/1.8, Leica R 15/3.5) have rear protrusions (spikes, levers, other appendages) which would damage the optics and/or housing of Speed Booster.They need to be modified before they can be safely used on Speed Booster.Check and make sure there are no rear protrusions from the adapter/lens combination before using on Speed Booster. Scratches and damages caused by rear protrusions on Speed Boosterare not covered by warranty.
Every Pentax K-mount lens has a protruding fin and an aperture lever. It does NOT fit.