Stereo shooting options multiplied at NAB, with Sony and Panasonic both introducing new shoulder-mount single-body 3D camcorders. Meanwhile, more alternatives popped up in the sub-$5000 price range.

Sony’s PMW-TD300 camcorder captures full 1920×1080 pixel left-eye and right-eye images with two 1/2-inch Exmor 3 CMOS censors and records XDCAM EX images to separate SxS cards. It has a 45mm interaxial and a minimum convergence distance of 1.2m. It’s coming late 2011, Sony said, and will cost you “around $33,000.”

Panasonic’s forthcoming AG-3DP1 has 1/3-inch imagers and records to 1080/24p using the AVC Intra codec with 10-bit color depth. It comes with matched 17x zoom lenses, HDMI and dual HD-SDI outputs, two XLR audio inputs, variable frame rate recording, Genlock and timecode. The AG-3DP1 is coming in the fall, but Panasonic has not yet named its price.

JVC’s new GY-HMZ1 is a deceptively tiny camcorder that records left and right images at full 1920×1080 resolution on two 3.32 megapixel CMOS sensors. It records AVC HD at 34 Mbps with timecode at 60i or 24p. Footage can be captured to 80 GB of internal memory or to standard SDHC or SDXC cards. Lenses have a 5x zoom factor for 3D shooting (10x for 2D). The demo footage was surprisingly good for a camera of that size, with convincing depth effects. It’s scheduled to ship this fall for less than $2500.

Sony’s new NXCAM HXR-NX3D1U is the competition for JVC’s camera. It also records full HD images to two CMOS sensors, packing the pictures into a single file recorded on 96 GB of internal flash memory or inserted SD card/memory stick. Sony Vegas Pro can read that file, or an included software utility will split it into left and right AVC HD video streams for cutting with your NLE of choice. It has twin 10x zoom lenses as well as a detachable XLR adapter and an included ECM-XM1 shotgun microphone. Supported 3D frame rates are 60i, 50i and 24p. It’s coming this summer for $3400.