http://panasonic.net/avc/projector/preliminary/rq13k_rz12k/
http://panasonic.net/avc/projector/preliminary/rq13k_rz12k/img/spec.gif
http://altadefinizione.hdblog.it/2015/06/18/Sony-VPL-GTZ270-VPL-GTZ280-Laser-4K/
http://pro.sony.com/bbsc/ssr/mkt-infocomm2015/mkt-infocomm2015new/product-NEWPROD2015/?prd=VPLGTZ270
https://www.youtube.com/watch?v=QwHEawdpvTw