Quote from the review:
“The way the VPL-HS51 achieves this black level is through a bit of mechanical trickery. The processor tracks the incoming video signal and adjusts the iris accordingly. Dark scenes become darker, and bright scenes become brighter. While the Panasonic in this issue uses similar technology, the Sony is more successful at it. A full-on/full-off contrast ratio of 2567:1 is simply amazing for any LCD projector, not to mention one that costs $3,499. ”
