Product Identification and Markings

Marking	Description
metabones	Metabones® is our brand name.
Mount	Type of mount: Lens mount in prefix and Camera mount in suffix. E.g., "EF-E mount" means a Canon EF-mount lens to a Sony E-mount camera adapter.
"T" Mark	The inner opening is lined with a flocking material coating. This will further reduce internal reflection, especially when a tilt-shift (TS) lens is used.
CINE	CINE Series, Featuring Patented Positive-Lock Mechanism. The CINE version is equipped with an extremely robust cine-style positive-locking mechanism to ensure that no play occurs during manual focusing. This is especially important when using PL/ EF lenses for cinema work.
"S" Mark	Adjustable flange focal distance with shims, a set of Lens Adapter Shims included for the PL-lens model.
"eND"	Built-in internal electronic ND (Neutral Density) filter system.
Speed Booster	Speed Booster® - Focal reducer, a special lens adapter that reduces focal length and increases the effective aperture, allowing more light to reach the sensor and making full‑frame lenses behave more full-frame-like in FOV on smaller APS‑C cameras, or Super35-like in FOV on Micro Four Thirds cameras. Key feature: Make the lens wider, brighter, and sharper. Using high‑index lanthanum glass (Caldwell Photographic design).
Expander	Focal expander, a special lens adapter that enlarges the image circle of the used lens to cover a larger-format sensor camera without cropping, such as Fujifilm GFX medium-format cameras. Using high‑index lanthanum glass (Caldwell Photographic design).
Smart	Smart Adapter^TM/ Smart Expander^TM is the adapter that includes electronic connections for communication between the lens and the camera.
Mark "II"	Mark II Technology (for a new generation of EF to X-mount and MFT mount adapter) Mark II Technology works by having additional data tailored for your lens, resulting in the highest performance possible with a lens mount adapter. Lens profile data of supported lenses is preloaded into your Speed Booster or Smart Adapter. The LED turns pink to indicate that a matching lens profile is found and Mark II technology is operational. Click on any product below to see the list of lenses supported by Mark II Technology.