Broaden your market to include artist that need to transfer photo images by hand tracing from an iPad. Look at Apple app Camera Lucida at http://www.cameralucidaapp.com/. We use the iPad camera now by laying it flat and using the apps to transparently show the image and our tracing; but this limits our drawing size because we cannot view the iPad with image resolution longer than our arms. By shifting the iPad on its side we will get larger transfer images, higher about the art work, and still be able to see the screen. Review the above link and see if your product is a good fit. I know I would buy if it worked with the Apple camera without distortion, or it you worked with the Camera Lucida people to modify their app to handle your product… win win. Please let us know if it is possible. Big market with artist needing to transfer precise images for commission work.
Thanks,