Surprisingly good, highly practical

the two converters ECF 1 (Fisheye) and ECU 1 (Ultra Wide) have me absolutely surprised. I had bought it is necessary as a last resort, if you are traveling with a SLR equipment and little luggage (bicycle, air travel). The combination Nex with 16mm Pancake and the two converters are extremely lightweight and compact and cover the range up to 24 mm fisheye in Aperture 2.8. The total weight is then up to almost 600 gr. The in conventional lenses makes at least 3 -4 times weight, and one may have no reserve camera.

The image quality ...
... Is surprisingly good. I compare: A NEX 5 with the converters and an SLT 33 with Sigma 10mm 2.8 Fish Eye and 12-24 mm FF-Zoom in 12mm focal length. Very surprisingly, in both cases, the focus of the converter combination was at least as good, in the center even better than that of the two Sigma lenses. Only in the extreme corners of the image (about the size of the old-fashioned photo corners) is building the converter trio from brutal, but this probably is closer to the Pancake. However, this is just in super wide angle shots often not a problem. Even the chromatic aberrations (purple fringing) are not stronger than that of the sigmoid colon.

The practicality ...
... The low weight is just great. The change of the converter is pretty fast thanks to bayonet, the catches can find yourself quite well in the dark. The convenience of a zoom there are of course not. However, a push has not the intensity. 2.8 as light intensity and at the Nex cameras that provide easy to ISO 3200 reasonable pictures as Avalible-Light makes photography such as in fetuses and festivals and in the city (eg Recently, the Luminale in FFM) fun. In the right pocket to fisheye, in the left the SWW converter and in his hand the 16mm (equivalent to 24mm) with NEX, so arise photos and movie clips with WOW effect, far from the compact camera monotony. The rest of the photo equipment in the camera bag is often no longer required for such occasions. The converted reportage 24mm focal length often sufficient.

Unfortunately, you can start on the SWW converter no pole filter. That's the only real drawback 'depending on personal application with deal breaker characteristics. Who photographed much landscape miss this painful and then but have to pack a 10mm focal length plus x.