This high performance CCD filter transmits only the Hydogen Beta emission line, and therefore is useful for greatly increasing the contrast of objects that glow in the corresponding region of the spectrum, for example the Horsehead, Cocoon and California nebulae.
2 Rosemary Lane, Sutton nr. Ely, Cambridgeshire, CB6 2NZ Telephone Hours: Monday to Friday - 10:00am-4:00pm Our showroom is currently closed for visits until further notice. We are closed on Bank Holidays. Online orders are despatched as normal.