Features High quality Explore Scientific O-III filter Let only the oxygen emission lines “through” Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwidth: 6.5 nm Narrow-band design for difficult city conditions More contrast and details for all urban observers and astrophotographers An individual test report of this premium filter is […]

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwidth: 12 nm For observing faint planetary nebulae, emission nebulae and supernova remnants More contrast and details for all urban observers and astrophotographers An individual test report of this premium filter is included in the […]

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwidth: 6.5 nm For observing faint planetary nebulae, emission nebulae and supernova remnants More contrast and details for all urban observers and astrophotographers An individual test report of this premium filter is included in the […]

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen “through” Absorbs almost all of the artificial light More contrast and details for all urban astrophotographers Passband bandwidth: 12 nm H-alpha filters can only be used for astrophotography Ideal for use near cities with a slightly brightened sky Also blocks almost […]

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen “through” Absorbs almost all of the artificial light More contrast and details for all urban astrophotographers Passband bandwidth: 7 nm H-alpha filters can only be used for astrophotography Narrow-band design for difficult city conditions and with heavily brightened skies Also blocks […]

Features High quality Explore Scientific O-III filter Let only the oxygen emission lines “through” Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwidth: 6.5 nm Narrow-band design for difficult city conditions More contrast and details for all urban observers and astrophotographers An individual test report of this premium filter is […]

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwidth: 12 nm For observing faint planetary nebulae, emission nebulae and supernova remnants More contrast and details for all urban observers and astrophotographers An individual test report of this premium filter is included in the […]

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwidth: 6.5 nm For observing faint planetary nebulae, emission nebulae and supernova remnants More contrast and details for all urban observers and astrophotographers An individual test report of this premium filter is included in the […]

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen “through” Absorbs almost all of the artificial light More contrast and details for all urban astrophotographers Passband bandwidth: 12 nm H-alpha filters can only be used for astrophotography Ideal for use near cities with a slightly brightened sky Also blocks almost […]

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen “through” Absorbs almost all of the artificial light More contrast and details for all urban astrophotographers Passband bandwidth: 7 nm H-alpha filters can only be used for astrophotography Narrow-band design for difficult city conditions and with heavily brightened skies Also blocks […]