Disappointing as I wanted to create a Pink Floyd Dark Side of the Moon effect. That creates a spectrum, but not what the album cover looks like. It is actually an EQUISIDES triangle that creates this view, not a right prism. Again, it manages a spectrum, but not at the angles shown on the album cover. My mistake. So if you know what you're looking for and it's the right prism, you're good to go. If you think you're going to recreate Pink Floyd, you'll be disappointed if you don't choose the right prism, and you aren't.