21. Using his 11 inch Clark Brothers photographic refractor he took a 50-minute exposure. 22. The Carnegie twin refractor is located in a mid-sized dome at the observatory. 23. It boasted of an 8 " Cooke Astrograph and a 15 " Grubb refractor telescope. 24. It houses the double refractor , two 0.33 meter refractor telescopes mounted together. 25. It houses the double refractor, two 0.33 meter refractor telescopes mounted together. 26. The Observatory houses a magnificent refractor built by Howard Grubb ( Grubb Telescope Company ). 27. His first telescope, a tiny 2-inch refractor , was a childhood Christmas present. 28. Meade offers a beginner's refractor ( Meade NGC-60 ) for $ 200. 29. During the early 20th century this contained a 22-inch ( 56 cm ) refractor . 30. The refractor was the last great telescope from Fraunhofer, that was still available in M�nchen.
