CHROMA TECHNOLOGY H-ALPHA FILTER Size:50mm square Female M42 x 0

Female M42 x 0

Prevents dust and moisture from entering the optical tube and reaching the primary and secondary mirrors

SkyWatcher EQ6-R mount

so this is strictly a photographic filter and benefits from cameras with good IR response such as the QHY462C

otherwise irreversible damage to eyes and equipment may occur

CHROMA TECHNOLOGY H-ALPHA FILTER Size:50mm square Female M42 x 0Chroma narrowband filters are the highest performing filters on the market today. They are available with a range of bandpasses and sizes to suit any configuration where the finest image quality is of paramount importance. H alpha filters are essential for imaging nebulae and other objects which are rich in ionized hydrogen. At 656. 3nm, a narrow band emission filter is required to separate H alpha from the SII doublet (671. 6nm and 673. 1nm). All