All the matte-finished, anti-glare films we've tested thus far with the third-generation iPad have had the same problem: they have a prismatic effect, a rainbow-colored distortion that's especially noticeable on the tablet's high-resolution Retina display. Our most recent test is with Spigen SGP's Steinheil Ultra Fine Screen Protector ($25). Packaged with the same accessories as the company's other films -- cleaning solution, a squeegee, and a cloth…
