I remembered the DIY lens post, and remember going to the prismasonic site and seeing it listed there with more info, but alas, that page is gone.
Email them, maybe you'll get lucky.
|The only artifact I've run into os some pincushion on the bottom of the screen only. I'm hoping repositioning the projector further back in the room will solve this.
Make sure to try tilting the lens so that the light path from the PJ passes directly through the center on the front lens. Tilting the lens up/down should show you how that affects pincushion. For me, I found the spot where the pincushion was equal top and bottom, which helped lessen it overall.
Also, I am back a little over 10' from the screen which is a 86" (at 1.78) diag screen at 2.35AR. I get roughly a 1.7 throw ratio, which IMHO, if barely enough as it barely fits within the lens using my epson 550.