Originally Posted by mcbg1
Can you please let us know your new settings? I've also had my set for a while now and I'm wondering if I should change anything.
Plasmas are obviously going to dim over time from continual use. I think I've read that they dim relatively quickly at first, then it becomes more gradual (or I could be just pulling this out of my butt). Since I've had my panel for over 15 months, the "right" Contrast setting has probably changed. I don't have a measuring device, so what are you going to do? I decided to bump up the Contrast from 80 to 83. (A Contrast of 80 yielded 33.5 ftL of light for my panel according to a calibration done after two months of ownership. Doug Blackburn likes it at 35 ftL, but has stated that anything in the range of 30-35 ftL is ideal for viewing in a dark room, which is a Contrast of 78-84 for most panels that Doug has worked on.)
Like I said before, changing the Contrast in this way is (obviously) arbitrary, or an "absolute guess" as pbc stated. I'm not recommending that people do it--I'm just saying what I've decided to do for myself. Bumping it to 83 was hardly a radical move, though. Even if one's panel hasn't dimmed at all, bumping up the Contrast isn't going to screw up the PQ since these panels don't seem to suffer any adverse effects from high Contrast settings--at least up to 97. (If you are bothered by too much ambient light in the room, one of the steps that Doug has suggested is to increase the Contrast to about 97. Why not 100? Doug hasn't said, but the inference is that going beyond 97 can't be good.) The only really bad thing about arbitrarily increasing the Contrast by a few notches is that, if one didn't guess right, it might cause eye fatigue when viewing in a dark room. In fact, the main reason why the Contrast is set to 78-84 in the first place is that it yields a pleasing picture without being fatiguing to the eyes in a dark room.
Frankly, I would be more worried about arbitrarily changing the other settings by a few notches, such as the Brightness, Color, Tint, Sharpness, etc. That will definitely screw up the PQ.
Again, I'm not saying one should do as I did. This is the AVScience forum, after all. An arbitrary recommendation ain't exactly scientific. So please, please don't try this at home, kiddies, or you will unwittingly trigger the coming Apocalypse.
BTW, I did check the Brightness, Color and Tint settings using a setup disc. The Color and Tint didn't need any adjusting, nor did the Brightness (even after arbitrarily bumping up the Contrast).