Katie Curtis

Baader Planetarium, long a source of premium astronomy accessories, now expands its line of imaging filters to include a set of four narrowband filters. Starting at $495 for a set of 1¼-inch mounted Hα, Hβ, O III, and S II filters with 7- to 8.5-nm bandpasses, these multilayer dielectric filters are hardened so that users will be unlikely to damage the coating when they're cleaning off dust. Each filter is made from striae-free glass polished to a surface accuracy of ¼ wave to guarantee that they won't degrade the image quality of your telescope. Each filter is available separately, and they're also offered in 50.8-mm diameters without cells.

Baader Planetarium


Available in the US from:
Santa Barbara Instrument Group

147-A Castilian Dr.
Santa Barbara, CA 93117

805-571-7244; www.sbig.com

SkyandTelescope.com's New Product Showcase is a reader service featuring innovative equipment and software of interest to amateur astronomers. The descriptions are based largely on information supplied by the manufacturers or distributors. Sky & Telescope assumes no responsibility for the accuracy of vendors statements. For further information contact the manufacturer or distributor. Announcements should be sent to nps@SkyandTelescope.com. Not all announcements will be listed.


You must be logged in to post a comment.