CHROMA TECHNOLOGY H-ALPHA FILTER Size:50mm square After H-alpha

After H-alpha

625 x Light gathering power 1275 x (compared to unaided eye) Focuser 2" Crayford with 1

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

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

This allows to connect two telescopes in parallel with the advantage to lower the barycenter and therefore reduce the counterweights needed

CHROMA TECHNOLOGY H-ALPHA FILTER Size:50mm square After H-alphaChroma 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