A razor-sharp and super bright projection lens from Isco-Gottingen, with perspecti control to correct keystoning and distortion from the projector's position. Optics are clean, no haze, scratches, etc. This lens is a solid chunk of metal and glass and is the highest-quality of projection lens available for the Kodak Carousel mount. Perfect for any professional installation in a gallery or museum, or for high-fidelity viewing at home.