The new firmware also makes a few corrections to other areas of the cameras' operation. Power consumption when the cameras are turned off is said to have been reduced, and the stitching accuracy of sweep panoramas with large areas of low or variable subject detail (such as the sea or sky) has been improved. Startup time has also apparently been improved, but curiously Sony states this improvement comes specifically when powering the cameras up in low-light conditions.
The 3D Sweep Panorama function works similarly to the existing Sweep Panorama mode in implementation, with the user panning the field of view across the subject while photos are automatically captured and joined together in-camera. Some clever math allows two separate panoramic views to be reconstructed as subjects move from one side of the field of view to the other, and the result is saved as a multi-picture object(.MPO) file containing two JPEG panoramas with differing perspective. The result can then be viewed on a 3D-capable Sony Bravia television.
The Sony NEX-3 firmware v2 is a 57.33MB download, while the Sony NEX-5 firmware v2 is a 57.19MB download. At the current time, the firmware downloads are only available for users on Windows XP, Windows Vista 32-bit or 64-bit, and Windows 7 32-bit or 64-bit.