Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 40mm aperture H-alpha filter can be used with virtually any telescope – but is designed to work best with refractor telescopes having a focal length of under 1000mm . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 40mm aperture H-alpha filter can be used with virtually any telescope – but is designed to work best with telescopes having a focal length up to 1500mm. The front filter element (containing the ERF and etalon) requires an optional custom mounting plate to attach to your specific telescope. The filter is provided with a 15mm clear aperture blocking filter mounted in a 1.25" right angle star di . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 60mm aperture H-alpha filter can be used with virtually any refractor telescope having a 60mm or greater aperture – but is designed to work best with telescopes having a focal length of 1000mm and under . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 60mm aperture H-alpha filter can be used with virtually any refractor telescope having a 60mm or greater aperture – but is designed to work best with telescopes having a focal length of 1500mm and under . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 60mm aperture H-alpha filter can be used with virtually any telescope having a 60mm or greater aperture – but is designed to work best with telescopes having a focal length of under 3000mm . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 90mm aperture H-alpha filter can be used with virtually any telescope having a 90mm or greater aperture – but is designed to work best with telescopes having a focal length of under 1000mm, particularly fast focal ratio refractors . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 90mm aperture H-alpha filter can be used with virtually any telescope having a 90mm or greater aperture – but is designed to work best with telescopes having a focal length of 1000mm to 1500mm, particularly with refractors . . .
Product is special order only; please call or e-mail for approximate delivery time. A 20% nonrefundable deposit is required when ordering.
This 90mm aperture H-alpha filter can be used with virtually any telescope – but it will work best with telescopes having a focal length of 1500mm to 3000mm, particularly with long focal ratio refractors . . .
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