Fits both EF and EF-S lenses to Sony Full Frame E Mount cameras
| Features and benefits | Limitations |
Electronic
- Phase-detect autofocus support on A7RII.
- Supports 5-axis in-body image stabilization of A7II and A7RII,
- Powered by camera body. No external power source required.
- Aperture control from camera body.
- Wide open button (opposite of depth-of-field preview function) makes manual focusing easy and assignable to a custom function on A7 series.
- High performance 32-bit processor and efficient switched-mode power supply.
- Supports image stabilization (IS) lenses.
- Supports electronic manual focusing (e.g. EF 85/1.2L II and discontinued EF 50/1.0L)
- EXIF support (focal length, aperture, zoom range)
- Distance and zoom display on VG and FS series camcorders (lens with distance information support required).
- Auto magnify (lens with distance information support required)
- Auto "APS-C Size Capture" on full-frame cameras with Canon EF-S lenses and many third party DX lenses.
Optical/mechanical- Fits both EF and EF-S lenses. (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.)
- Flocking material coated inside the opening to reduce internal reflection.
- The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads.
| Autofocus- Fast phase-detect AF is available only on A7RII. on other Sony cameras, contrast-detect AF with an EF mount lens is disappointingly slow and inadequate for all but static subjects,
- Even on A7RII, long telephoto lenses hunt more often and auto focus performance progressively deteriorates as focal length gets longer.
- On A7RII, the AF points near the center always work well, but those on the edges and in the corners may lose effectiveness when a fast lens or a telephoto lens is used.
- A7RII supports only contrast-detect AF during video recording. This means video AF speed may be unsatisfactory.
- During movie capture, autofocus needs to be manually activiated by half-pressing the shutter release button if subject moves to a different distance. Since contrast-detect autofocus speed is slow, there may be visible disruption in the resulting footage.
- With PXW-FS7, NEX-FS700 and NEX-FS100, autofocus works only in photo mode but disabled in movie capture mode.
- Continuous AF is not supported. (Does not work with contrast-detect AF and may have unsatisfactory performance with phase-detect AF of A7RII.)
- Eye AF is not supported.
- DMF mode (direct manual focus) is not supported.
- 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.
Other- No support for lens corrections such as peripheral shading, CA and distortion.
- Early Tamron VC lenses such as the 17-50/2.8 B005 may not be able to freely switch between OIS and IBIS because they may not report IS activity status. The latest generation Tamron VC lenses are fine.
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