Yes, IS is supported. Tested image stabilization lenses include Canon EF-S 18-55/3.5-5.6 IS II, EF-S 18-135/3.5-5.6 IS, EF 24-105/4L IS USM, EF 28-135/3.5-5.6 IS USM, EF-S 55-250/4-5.6 IS, EF 70-200/2.8L IS USM (I), EF 70-300/4-5.6L IS USM, EF 70-300/4-5.6 DO IS USM, EF 100/2.8L IS USM macro, EF 300/4L IS USM and Sigma DC 18-125/3.5-5.6 HSM OS lens in Canon EF mount. The Canon IS lens is powered by the Sony camera body and no external power source is required.

We use NEX-7, NEX-5N, NEX-VG20 , NEX-VG10 , NEX-5 and NEX-3 for development. This adapter is also tested with NEX-FS100. We are unable to test on every camera model, however. Please report to us any compatibility problems you find with your camera, and we will look into it immediately. 

Yes, this adapter supports Contax N lenses which have already been converted to Canon EF mount by us.

NAM-1 adapters modified by us to Canon mount can be stacked on top of our Canon EF lens to Sony NEX mount adapter. By stacking these 2 adapters together you may use a Contax 645 lens on a Sony NEX.

If you wish to change the Contax 645 lens, you must remove both the Contax 645 lens and the modified NAM-1 adapter, change the Contax 645 lens on the modified NAM-1 adapter first, and then mount both on the Metabones Smart Adapter. 

We are not sure. We are not licensed, approved or endorsed by Sony or Canon. Our Smart Adapter was developed independently without any involvement by Sony or Canon. We do not have complete specifications of the respective mount communication protocols and we are unable to foresee what will happen with every future Sony camera or Canon lens. The firmware stored inside our Smart Adapter is factory-upgradable. If a compatibility issue does arise in the future we will attempt our best to come up with a resolution.

Yes! When a manual focus lens with no electronics whatsoever is attached to the Metabones EF Lens to E Mount Smart Adapter, the Smart Adapter's electronics is completely turned off, and behaves as a dumb adapter.

The adapter has a wide open (WO) button. In normal operation, the lens is stopped down and you are seeing the actual taking aperture on the LCD screen. While the WO button is depressed, the lens is set to wide open for ease of manual focusing.

At this moment, the operation of the button is the exact reverse of the DoF preview button on a DSLR camera body. The functionality of the WO button may change in future versions of our adapter firmware, based on end-user feedback and our further research on this topic.

In our opinion, this functionality is best implemented on the camera body by Sony. Since that has not happened yet, we are doing the best we can to implement this functionality in our adapter, within the constraint that both still photographers' and videographers'/cinematographers' interests are taken into account.

No. The Canon lens is powered by the camera body and no external power source is required.

Different Sony NEX cameras may display aperture values differently.

 Sony NEX-5/3 body displays the apertures as F1, F1.1, F1.3, F1.4, F1.6, F1.7, F2 and so on, but a Canon camera body displays the exact same apertures as 1.0, 1.1, 1.2, 1.4, 1.6, 1.8, 2.0 and so on.

They are the exact same apertures, but different companies choose to round them and display them differently. Mathematically speaking you multiply each f-number by 1.122462 to get the next f-number 1/3 stops down. The actual f-stop sequence, rounded to 2 decimal places, would then be 1.00, 1.12, 1.26, 1.41, 1.59, 1.78, 2.00.

NEX-5N and FS100 will display 1.2, 1.3, 1.4 and other intermediate f-numbers (apertures) with a f/1.2 Canon lens.

No. Canon EF lenses are originally designed for still photography and do not support certain advanced features required for cinematographic use. The aperture diaphragm moves in 1/8 stop steps.

The Canon EF lens to Sony NEX Smart Adapter is the first product in the Smart Adapter^TM series. Expect other Smart Adapters to follow suit. However, we are not ready to communicate what we are working on yet. We can neither confirm nor deny anything about our future plan. Your suggestion is greatly appreciated. Please send your suggestions to info@metabones.com.

As of today, between Metabones and Conurus we already have pretty comprehensive coverage of most popular mounts (as well as some rare ones).

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