A wide field of view reveals a larger portion of the night sky, allowing you to view more of the comet's impressive tail. With large 50 mm objective lenses have tremendous light gathering ability, Cometron are ideal for astronomical use. Multi coated optics dramatically increase light transmission for brighter images with increased contrast and resolution. Large exit pupil provides maximum light during nighttime and low light viewing sessions. Made with a strong and durable aluminum housing. Must be a patron of Eagle Valley Library District to borrow from the Library of Things.