I posted in this thread (http://www.avsforum.com/avs-vb/showthread.php?p=12568927#post12568927) about my Panasonic AE2000U PJ having terrible misconvergence.

When the PJ is ceiling mounted I have almost the maximum amount of vertical lens shift dialed in, and very little horizontal. The focus is bad - it's somewhat decent at the top of the screen but out of focus at the bottom of the screen, and the image appears to have very bad convergence (http://www.avsforum.com/avs-vb/showthread.php?p=12559709#post12559709). tvted suggested it could be chromatic abberation, not misconvergence. When I tested the PJ in a more central position with little lens shift, the convergence was almost spot on and the focus was great.

So.. My question for you panny AE2000U owners that have complained of convergence problems: have you tried positioning the PJ centered on the screen with very little lens shift to see if that corrects the apparent misconvergence problem? Maybe the lens shift in this PJ really screws up the image quality? The manual even says to use less lens shift for the best picture but I've always heard that lens shift is supposed to offer good image quality and it's just the digital adjustments like keystone that cause quality issues.

I posted in this thread (http://www.avsforum.com/avs-vb/showthread.php?p=12568927#post12568927) about my Panasonic AE2000U PJ having terrible misconvergence.

When the PJ is ceiling mounted I have almost the maximum amount of vertical lens shift dialed in, and very little horizontal. The focus is bad - it's somewhat decent at the top of the screen but out of focus at the bottom of the screen, and the image appears to have very bad convergence (http://www.avsforum.com/avs-vb/showthread.php?p=12559709#post12559709). tvted suggested it could be chromatic abberation, not misconvergence. When I tested the PJ in a more central position with little lens shift, the convergence was almost spot on and the focus was great.

So.. My question for you panny AE2000U owners that have complained of convergence problems: have you tried positioning the PJ centered on the screen with very little lens shift to see if that corrects the apparent misconvergence problem? Maybe the lens shift in this PJ really screws up the image quality? The manual even says to use less lens shift for the best picture but I've always heard that lens shift is supposed to offer good image quality and it's just the digital adjustments like keystone that cause quality issues.

Hi Scottz
If your focus is "decent at the top of the screen but out of focus at the bottom " maybe your PJ / screen or both are not perfectly level. Walls are not always level. The PJ lens axis must be perpendicular to the screen (vertically and horizontally). If you tilt a little your PJ (or your screen), you will not get a good focus in all the screen.
I did not notice problems with the lens-shift of my AE2000, but extreme positions can cause chromatic aberrations (no lens is perfect). Worst is keystone, leave it on "0" because it blurs the picture.

I read in one of the RS1 threads that they were able to affect some of the MC via changing the lens shift.

How does lens shift work? Do any of the lcd panels move or just the lens? And if it's just the lens, is it the whole optical assembly or a few components? Also, why don't most dlp projectors offer this and why are their zoom ratios so short?
Thanks for any replies.