4mm Plossl eyepiece Orbinar 31,7mm (1.25 ") (Electronics)
Hello, in addition to a BARLOW SEBEN, with the appearance of Comet ISON, I wanted a 4 mm eyepiece to compensate for those 10 and 25 mm delivered with my POLLUX and quality is by appointment seen investment. Naturally target with 4 mm is dangerous but