Metabones Canon EF Lens a Sony NEX Camera Lens Mount Adapter Mark IV MB_EF-E-BM4

Fuori produzione sostituito da MB-EF-E-BT4 

Electronic aperture, EXIF, image stabilization, autofocus

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This Smart Adapter^TM has the following 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.
• Powered by camera body. No external power source required.
• Wide open button (opposite of depth-of-field preview function) makes manual focusing easy.
• The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
• High performance 32-bit processor and efficient switched-mode power supply.

Enhancement on MARK IV vs. MARK III:

• The new design of inner housing in MARK IV has a bigger inner hole. Improving the Tilt shift lens preformance. 
• The inner hole is painted with matt coating. This can further reduce the internal reflection. 

Disclaimer: we are NOT licensed, approved or endorsed by Sony or Canon.

Description

Compatibility

Note:

1. Vignetting at corners may occur for certain EF-S lenses because they are designed to cover a 1.6x crop image circle but Sony NEX has a 1.5x crop sensor.
2. Requires lenses supporting distance information.
3. A third party zoom lens may need to be registered with the Smart Adapter first in order to detect its maximum aperture. Autofocus is disabled for most third-party lenses.
4. For example, some improperly-made M42 screw mount adapters may cause a short-circuit with the electronic contacts of the Smart Adapter and cause damage to the Smart Adapter and/or camera body.

Tested Camera Bodies

• A7S (Mark IV supports auto "APS-C Size Capture" with EF-S lens)  - Smart Adapter with firmware V0.32
• A7R (Mark IV supports auto "APS-C Size Capture" with EF-S lens)  
• A7 (Mark IV supports auto "APS-C Size Capture" with EF-S lens) 
• NEX-FS700 (autofocus works only in photo mode, but is disabled in movie capture mode)
• NEX-FS100 (autofocus works only in photo mode, but is disabled in movie capture mode)
• NEX-EA50
• NEX-VG900 (Mark IV supports auto "APS-C Size Capture" with EF-S lens)
• NEX-VG30
• NEX-VG20
• NEX-VG10
• NEX-7
• NEX-6
• NEX-5R
• NEX-5N
• NEX-5
• NEX-C3
• NEX-3
• NEX-A6000

Tested Lenses

The following lenses have been tested for autofocus operation. Minimum firmware version required shown in parenthesis. Thanks to the community for reporting success with lenses shown in bold.

Note:

• Sigma 17-70/2.8-4 OS HSM may occasionally run into a focus accuracy issue at the telephoto end.

Manual Focus Only

The following lenses have been tested with previous firmware versions with manual focus, aperture control, image stabilization (if applicable) and EXIF support. Autofocus is supported only for those lenses marked with an asterisk (*) on NEX-5R/6

This Smart Adapter is also compatible with fully manual lenses which have no electrical contacts. Customers have reported success with the following fully manual lenses.

• Samyang 35/1.4
• Zeiss CP.2 25mm/T2.9
• Zeiss CP.2 100mm/T2.1

Note:

1. Lenses not listed above are not tested and they may or may not work. We do our best to resolve any compatibility issue you find but firmware updates are by factory service only and there is a nominal shipping/handling charge.
2. Mount lens on EF Extender 1.4x or 2x first before attaching both on Metabones Smart Adapter.
3. Mount Contax 645 lens on modified NAM-1 first before attaching both on Metabones Smart Adapter.

Autofocus

Autofocus is supported, with the following known limitations.

• Autofocus speed is very slow and inadequate for most moving subjects. The autofocus speed is unfit for professional use for sure, and it would disappoint most enthusiasts.
• 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 and all Contax N lenses modified by Conurus.
• On NEX camera bodies in camcorder form factor (e.g. FS series), autofocus may be available only in photo mode but not in movie capture mode.
• Continuous AF is not supported.
• DMF mode (direct manual focus) is not supported.
• For non-camcorder camera bodies (e.g. NEX-7), during movie capture, if the subject moves to a different distance, half-press the shutter release button to re-activate autofocus and lock onto the subject again. Since autofocus speed is slow, there may be visible disruption in the resulting footage.
• 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 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 NEX. Typical problems of this kind that we have seen include an unsmooth/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.

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.