I purchased a 50 ft HDMI cable with a booster. It did not work.When connected to a Samsung HD850 upconvert DVD player and an Optoma HD70 DLP projector, I could not get the projector to display the picture. The weird part was that the video signal output changed to a resolution of 720x468 when connected to to the 50 ft hdmi cable. I have never seen this resolution used in any video device.The same projector/DVD player setup worked fine (displayed a 480p picture, which looked great) with a 6 ft HDMI cable that was sold with the Samsung DVD player. The image output with the smaller hdmi cable was 480p.So, stay with smaller cables if you can.I am going to try out a different upconverting DVD player to see that makes any difference. Will post the findings.