There is a 64GB allocation of Flash memory on board, enough for four hours of footage at the top 3D quality setting, and nearly six hours at the top 2D quality setting. This can be further extended via the single SDXC-compatible SD card slot. A big blue-illuminated button on the rear switches between 2D and 3D modes.
We’ve also noticed that, when camcorders grab two frames within the area of a single CMOS, image quality drops dramatically in 3D mode due to the fact that each side of the stereoscopic picture has been squeezed into half the sensor. With the GS-TD1, there’s an entire 1/4.1in sensor for each side, which isn’t massive but better than half of any other current consumer 3D camcorder’s CMOSes, and will benefit from the back-illuminated technology too. So low light performance should, in theory, be significantly better than other 3D camcorders.
As with the Everio GZ-HM960, JVC has equipped the GS-TD1 with a LCD display incorporating parallax barrier technology. So you can see the 3D effect as you shoot, without the need for special glasses. This system is nowhere near as effective as shutter glasses, but it’s about the best currently possible without extra paraphernalia, and gives you the sense of depth required as you shoot.
The GS-TD1 has all the necessary physical features for enthusiast users, too. There’s a standard-sized accessory shoe, so you can connect third-party peripherals such as a radio mic receiver, with a minijack input nearby on the bottom edge of the lens body. Another minijack is available at the rear of the device for hooking up headphones to monitor your audio levels.
Strangely, a large part of the camera body is taken up by an internal battery compartment. This is considerably bigger than the 1460mAh unit included in the box, so although we don’t usually approve of captured batteries, at least in this case there are options for greater capacities if desired. Also strange is use of a manually operated lens cover, rather than one which opens automatically when you turn the camcorder on.