[DP Review]

Why 3D, Why Now?

3D Video: Who’s playing?

All of the major television manufacturers offer 3D-compatible TVs, and today’s big 3D releases are available for purchase on Blu-ray, to watch in the home. After a long wait, there is now a standard for 3D video.Announced earlier this year, AVCHD 2.0 includes support for 1080 60p and 50p, and high-definition 3D movies encoded using Multiview Video Coding (MVC). As far as 3D video creation is concerned, Panasonic and Sony are currently the only two companies that offer an ‘end-to-end’ 3D solution in both professional and consumer spheres, but in the consumer space they are also joined by JVC. 

As well as 3D display solutions, JVC currently markets two 3D camcorders, the twin-lens, twin-sensor GS-TD1B full HD 3D Everio, and the single-lens, single-sensor GZ-HM960BUS Full HD Everio, which can convert 2D footage into 3D in-camera. Like the GZ-HM960BUS, Panasonic’s HDC-TM900K is a conventional single lens, single sensor 2D camcorder but when paired with an optional 3D conversion lens it can record 3D footage.

Sony debuted its HD 3D Camcorder, the Handycam HDR-TD10, earlier this year. The twin-lens, twin-sensor TD10 allows the user to switch between recording in 3D and 2D, and if you don’t have a 3D-compatible TV or computer, footage shot in 3D can also be played back conventionally in 2D. Sony also markets the 3D ‘Bloggie’ compact video camera. Dual lenses provide 1920×1080 3D HD video and like the TD10, the Bloggie offers the option to record in 2D as well. 

The advantages of twin-lens, twin-sensor designs, like those shown above from JVC and Sony are primarily the ability to adjust the convergence of the two lenses (either manually or automatically), which is useful when shooting at close focussing distances, and low-light performance. With a single sensor per lens, there are many more pixels available to assemble the image, and in low light this means that downsampling (where the signals of neighboring photosites are combined to produce a cleaner, less noisy image) is more practical. 

Systems that use twin lenses but a single sensor cannot be adjusted for convergence (although this isn’t a problem in most shooting situations) but more seriously, they must necessarily use a smaller area of that sensor to record each of the left/right channels, limiting the options for downsampling, and thus increasing the risk of noisy footage in low light. Naturally though, twin-lens single-sensor systems are potentially less bulky and – of course – less expensive.

Still 3D Imaging

Life in 3D

Adoption Worries

Read the full story here: http://www.dpreview.com/articles/5239141538/3d-video-primer-part-2