Filtering the Skyglow

S&T: Lauren Darby
Omega Optical, a supplier of filters for the Hubble Space Telescope and the Mars Exploration Rovers, has entered the consumer market. Filters for sale to amateur astronomers include the 1¼-inch NPB filter (an ultrahigh-contrast nebula filter) for $75, the VHT (very high throughput) filter for $70, the HPOIII (high-performance oxygen III) filter ($85), and a galaxy-contrast-enhancement (GCE) filter for $80. Of note is the GCE filter, which offers high transmission across most of the visible spectrum but rejects wavelengths common in artificial lighting. All filters also are available for 2-inch eyepieces.

Contact: Omega Optical; www.omegafiltersebuyer.com

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