Unfortunately, No. You can try the PJ at different zooms and see where it is minimized. Then you need to zoom the picture so that some of it will end up on the masking or use the keystone function. Or, just live with it. This has to do with the quality and size of the lens. Some PJ's you notice this by putting up a grid pattern and it looks like some of the colors are not aligned. Similar to an RPTV but of course with single chip DLP there is no convergence. It has to do with quality of the lens as different color wavelengths are affected by the optics differently.

Hope this helps

Bob