Telescopes, Binoculars and AccessoriesCustom Scientific - Optical Filters, Optical Flats, Custom Optics Custom Scientific's High-Performance Optical Filters and Other Custom Optics Optical Flats Pricing Filters for Research Astronomy Filters for Amateur Astronomy with Pricing Custom Optics, Filters, Precision Glass Machining and Coating Optics Cleaning Kit Windows and Filters with EMI or RFI Shielding Filters for Fluorescence and Bio-Medical Instrumentation Optics in Large Quantities Custom Scientific, Inc. 3852 North 15th Avenue Phoenix, Arizona 85015 USA Phone: 602-200-9200 Fax: 602-200-9206