I have for sale the complete Celestron Silvertop plossls from the early 90's. 7.5mm, 10mm, 15mm, 17mm, 22mm, 26mm, 30mm, 36mm, 45mm and the 2" 50mm (has the black crown). All are excellent with perfect glass. The 30 and the 15 have a very minor mark on the barrel. Caps included. $595 shipped. Thanks Kurt. And thanks to Astromart too.