點解 VT50 contrast ratio 低過 VT30
點解 VT50 contrast ratio 重低過 VT30.VT50 only 3400:1 ,
VT30 6310:1 (THX mode) , 4860:1 (Profession mode).
VT50
http://www.digitalversus.com/tv-television/panasonic-viera-tx-p50vt50-p13511/test.html
VT30
http://www.digitalversus.com/tv-television/panasonic-viera-tx-p50vt30-p11009/test.html
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