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Canon EF Lens to Micro Four Thirds T Speed Booster XL 0.64x Mark II

Key Features

Features and Benefits		Limitations
Optical Increase maximum aperture by 1¹/₃ stop Increase MTF Makes lens 0.64x wider Patented 6-element/4-group optical design by Caldwell Photographic in the USA Supports 4k video mode with DX lenses (except on GH5). Electronic Autofocus Can be powered either by camera body or by third-party external 5V power source (not included) Iris/aperture controlled by the camera body Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lenses Image stabilization (IS) lens support Support for cameras with in-body image stabilization (IBIS), including Panasonic GX7, GX8, GX80/85 and Olympus cameras Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L) EXIF (focal length, aperture, zoom range) Distance and zoom display on camcorders (requires lenses supporting distance information) Cinema EOS lens support (CN-E 18-80mm T4.4 L), including AF (requires external 5V power through micro USB port), auto iris and servo zoom Other Detachable tripod foot compatible with Arca Swiss, Markins and Photo Clam ball heads. Rubber gasket protects MTF mount connection from dust and moisture. The opening is flocked with felt material to reduce internal reflection.		Supports only Panasonic GH7, GH6, GH5m2, GH5s, GH5, GH4, GH3, G3, G5, G6, G7, G9, G9 II, G10, GF3, GF5, GF6, GX1, GX8, GX80/GX85, GX9, Olympus E-PL7, PEN-F, Blackmagic Cinema Camera with Micro Four Thirds mount, Pocket Cinema Camera* and Micro Cinema Camera* EF-S lenses require modification to fit or may remain incompatible even after modification (but third party DX lenses can be used without modification) On GH5, Speed Booster XL can be used with full frame lenses only. DX lenses are unable to cover full-sensor-width readout + in-body image stabilizer (IBIS)** EF-S and third party DX lenses do not cover the full Micro Four Thirds sensor in still photo and FHD video (but will cover 4k video mode on GH4, GX8 and GX80/85). AF may not work if the maximum aperture of the lens plus any EF Extender or other teleconverter attached is smaller than f/8 before boost or smaller than f/5.1 after boost. Some Tamron lenses may have unsatisfactory AF accuracy. No support for Focus Stacking and Focus Bracketing on Olympus. EF-mount lenses are not silent but may make audible click noises during autofocus operation and iris changes which may be picked up by the built-in microphone of the camera. An external microphone is recommended for video. Use of Canon Cinema lenses such as CN-E 18-80mm T4.4 L KAS S for still photography is not supported. Iris changes are in 1/8 stop steps which may be noticeable in video recordings. Programmed exposure mode and shutter priority exposure mode should not be used for video. This limitation does not apply to Cinema EOS lenses which permit fine resolution iris control, such as CN-E 18-80mm T4.4 L IS KAS S. No support for in-camera correction such as peripheral shading, CA and distortion

Features and Benefits

Limitations

Optical

Increase maximum aperture by 1¹/₃ stop
Increase MTF
Makes lens 0.64x wider
Patented 6-element/4-group optical design by Caldwell Photographic in the USA
Supports 4k video mode with DX lenses (except on GH5).

Electronic

Autofocus
Can be powered either by camera body or by third-party external 5V power source (not included)
Iris/aperture controlled by the camera body
Smooth iris support with the latest Canon (2009+), Tamron (SP series 2013+) and Sigma (2016+) lenses
Image stabilization (IS) lens support
Support for cameras with in-body image stabilization (IBIS), including Panasonic GX7, GX8, GX80/85 and Olympus cameras
Electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
EXIF (focal length, aperture, zoom range)
Distance and zoom display on camcorders (requires lenses supporting distance information)
Cinema EOS lens support (CN-E 18-80mm T4.4 L), including AF (requires external 5V power through micro USB port), auto iris and servo zoom

Other

Detachable tripod foot compatible with Arca Swiss, Markins and Photo Clam ball heads.
Rubber gasket protects MTF mount connection from dust and moisture.
The opening is flocked with felt material to reduce internal reflection.

Supports only Panasonic GH7, GH6, GH5m2, GH5s, GH5, GH4, GH3, G3, G5, G6, G7, G9, G9 II, G10, GF3, GF5, GF6, GX1, GX8, GX80/GX85, GX9, Olympus E-PL7, PEN-F, Blackmagic Cinema Camera with Micro Four Thirds mount**, Pocket Cinema Camera*** and Micro Cinema Camera***
EF-S lenses require modification to fit or may remain incompatible even after modification (but third party DX lenses can be used without modification)
On GH5, Speed Booster XL can be used with full frame lenses only. DX lenses are unable to cover full-sensor-width readout + in-body image stabilizer (IBIS)
EF-S and third party DX lenses do not cover the full Micro Four Thirds sensor in still photo and FHD video (but will cover 4k video mode on GH4, GX8 and GX80/85).
AF may not work if the maximum aperture of the lens plus any EF Extender or other teleconverter attached is smaller than f/8 before boost or smaller than f/5.1 after boost.
Some Tamron lenses may have unsatisfactory AF accuracy.
No support for Focus Stacking and Focus Bracketing on Olympus.
EF-mount lenses are not silent but may make audible click noises during autofocus operation and iris changes which may be picked up by the built-in microphone of the camera. An external microphone is recommended for video.
Use of Canon Cinema lenses such as CN-E 18-80mm T4.4 L KAS S for still photography is not supported.
Iris changes are in 1/8 stop steps which may be noticeable in video recordings. Programmed exposure mode and shutter priority exposure mode should not be used for video. This limitation does not apply to Cinema EOS lenses which permit fine resolution iris control, such as CN-E 18-80mm T4.4 L IS KAS S.
No support for in-camera correction such as peripheral shading, CA and distortion

Description

The Micro-4/3 mount Speed Booster^® XL 0.64x adapter designed exclusively for the Panasonic GH4/GH5/GH6/GH7 and other selected Micro Four Thirds cameras (refer to the below camera compatibility table), with a magnification of 0.64x. The Speed Booster XL 0.64x uses an advanced 6-element optical design to achieve extraordinary optical performance at apertures up to an incredible f/0.80, a new record for Micro Four Thirds format.

The new Speed Booster XL 0.64x reduces the full-frame crop factor of the Panasonic GH4 from 2.0x to 1.28x, thus effectively transforming these cameras into APS-H format. When the GH4 is used in Cinema 4k video mode the horizontal full frame crop factor is reduced from 2.34x to 1.50x, thus effectively transforming the GH4 into a super-35 format 4k cine camera. In addition, the speed of any attached lens is increased by 1¹/₃ stops, with a maximum output aperture of f/0.80 when an f/1.2 lens is used. For example, a 50mm f/1.2 becomes a 32mm f/0.80, which is the fastest aperture available for full size Micro Four Thirds format. (More information can be found in the press release here )

Compatibility

The Speed Booster XL 0.64x is similar to the Blackmagic-specific 0.64x BMCC Speed Booster (MB_SPEF-BMCC-BM1), but has been completely re-designed to meet the following requirements:

The working distance has increased by 1mm to permit use on the Panasonic GH4 and a number of other Micro Four Thirds cameras without touching the flexible outer cover of the camera’s shutter mechanism.
The optics are optimized for a standard Micro Four Thirds filter stack thickness of 4mm rather than the 2.4mm found in Blackmagic cameras.
The image circle diameter has been increased to 21.63mm so that the full 17.3mm x 13mm Four Thirds format is covered. This has been achieved while maintaining unusually high image quality over the 17.4mm image circle used by the Panasonic GH4 in its Cinema 4k video mode.

Although the Speed Booster XL 0.64x has extra clearance compared to the 0.64x BMCC Speed Booster, there are still a number of Micro Four Thirds cameras that are not supported due to mechanical clearance issues. This is summarized in the table below, which is color-coded so that Green means the camera is supported and Red means the camera is not supported.

Note that many of the Red-coded cameras actually do function, but there is a minor interference with the protective shutter cover. Although slight contact with the shutter cover appears to have no effect on the functioning or cosmetics of either the camera or the Speed Booster we cannot support these combinations due to possible risk of damage.

BRAND	MICRO FOUR THIRDS CAMERA MODEL
Blackmagic	Cinema Camera	Pocket Cinema Camera (HD)	Micro Cinema Camera (HD)	Micro Studio Camera 4K	Pocket Cinema Camera 4K	Micro Studio Camera 4K G2 (BMMSC4K G2)	Studio Camera 4K Plus G2 (BMSC4K G2 Plus)	Studio Camera 4K Pro G2 (BMSC4K G2 Pro)	Studio Camera 4K (BMSC4K)	Studio Camera (BMSC)
JVC	GY-LS300
Olympus	E-M5	E-M1	E-M10	E-M5 II	E-M1 II
	PEN-F
	E-P1	E-P2	E-P3	E-P5
	E-PL1	E-PL2	E-PL3	E-PL5	E-PL6	E-PL7
	E-PM1	E-PM2
OM System	OM-1
Panasonic	AF100
	GH1	GH2	GH3	GH4	GH5	GH5s	GH5 Mk2	GH6	GH7
	G1	G10	G2	G3	G5	G6	G7	G9	G9 II
	GF1	GF2	GF3	GF5	GF6	GF7	GF8	GF800/ 850/9
	GX1	GX7	GX8	GX80/85	GX9
	GM1	GM5

GH7, XL or ULTRA?

In a nutshell, we recommend XL for full frame lenses and ULTRA for DX/APS-C lenses. For the long story, read the 'limitations' column.

Metabones Speed Booster XL 0.64x Specifications

Magnification: 0.64x

Crop Factor for Full Micro Four Thirds format: 1.28x

Crop Factor with GH4 in Cinema 4k (4096 x 2160) Video Mode: 1.5x

Maximum Output Aperture: f/0.80 (with f/1.2 lens attached)

Rectilinear Distortion: < 0.8%

Lens Elements/Groups: 6/4

Length Reduction: 6.2 mm

Camera Mount: Micro Four Thirds

Image Format: 17.3 mm x 13.0 mm (full Micro Four Thirds format)

Select the correct EF-MFT Speed Booster fit for your camera:

Why Metabones®?

Since its inception, Metabones has been designing and manufacturing lens adapters recognized among professionals and enthusiasts as leaders in design and workmanship.

Contrary to the popular trend of other factories using an aluminum ring painted black on the camera-body-side, we instead take no short-cut but use precision-machined brass with chromium plating on both the camera-body and the lens sides of our adapters, in order to ensure smooth mounting, great appearance, and durability. The lens side of the adapter features a strong leaf-spring structure, strengthening the adapter-lens connection and ensuring tightness of the lens in order to reduce wear and prevent focus errors and optical alignment issues from appearing.

Metabones uses matte-black treatment to keep internal reflection to a minimum in order to maintain the maximum optical quality possible with the lens.

All Metabones Adapters follow this tradition of uncompromising precision, robust build quality and outstanding finish. Our new Smart Adapter^TM series of products add industry-leading electronic interfacing technology from Canada, with true electronic control of the lens' aperture directly from the camera body.

Features

Both camera-side and lens-side of the adapter are made of brass, precision-machined and plated with chromium.
Satin surface finish - just like your OEM lens and camera mounts.
Precise fit and solid connection - lens has no play, gap or wiggling when mounted on adapter and no adjustments are required to fit your lens.
Designed to reach infinity focus while maintaining the correct registration distance required to maintain optical quality of CRC lenses or lenses with floating elements.

Our Smart Adapter^TM series adapters have the following additional features

True electronic integration of aperture diaphragm - let camera automatically choose aperture in P or S exposure modes, or dial in yourself on the camera body in A or M modes.
EXIF data such as lens identification, focal length and aperture.