$49.99Last catalog price, November 2009
Catalog description
Zhumell 1.25 Inch High Performance O-lll Telescope Filter, part number ZHUL062, is a discontinued product from the 2007–2011 catalog. It was last listed at $49.99.
This particular filter allows light transmission in the doubly ionized oxygen wavelengths. This is particularly good for viewing double star systems where a lot of emissions are in the doubly ionized oxygen range. Oxygen III (O-III) are great for viewing diffuse and planetary nebulae. The views of the Veil Ring Dumbbell Crescent and Orion nebulae are dramatically improved.
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