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£89.00 - £206.00
The Astronomik H-beta is a filter for visual observation, in particular with instruments of larger aperture.
£22.00 - £31.00
These contrast-enhancing filters are designed to block out the wavelengths of light emitted by mercury-vapour light and other common causes of light pollution.
£47.00 - £69.00
The narrowband UHC filter isolates the two doubly ionized oxygen lines (496 and 501nm) and hydrogen-beta line (486nm).