Join Date: Jun 2011
Location: Knoxville, TN USA
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Here's what I do to overcome the focus drift issue. I initially setup my projector high up on a shelf, aligned it on the screen on the opposite wall across the room and then let it run for 15 minutes or 30 minutes or until the focus stabilizes, meaning that it doesn't drift anymore, which on my unit is about 15 minutes (I have an Acer K330, but very similar to the ViewSonic PLED-W500, and all the clone projectors).
THEN, after there is no more focus drift, adjust the focus just right and leave it there. From then on, turn on the projector 15 to 30 minutes (however long it takes) before you intend to watch it. It's a bit inconvenient yes, but it works.
I come home, turn on the projector right away, have a shower and change into comfortable clothes, make a sandwich and some tea, and then go into the theater room to watch my projector which by that time is now all warmed up and in focus.
The ~20,000 hour lifetime of the LED HD(720P) DLP projectors: (ViewSonic PLED-W500, Acer K330, Optoma ML500, and NEC L50W) is so great, the extra startup runtime isn't a big issue; just turn on your projector long enough to reach stable focus before you intend to sit down and use it. It's a reasonable compromise/workaround to get such an awesome picture from a $500 to $650 projector that lasts ~20,000 hours. The rich colors and deep blacks from these clones is better than I have seen from so many other regular lamp projectors that cost much more to purchase AND require regular replacement bulbs costing hundreds of dollars !
You'll go nuts fiddling with the focus all the time, so don't do that.
You have an awesome piece of tech at a very breakthrough price with the "clones", capable of providing HD 720P wide-screen, cinema-like viewing right in your home, so enjoy it after it warms up instead of stressing out. Anyone else doing this?