Extremely durable coatings withstand humidity changes and extreme temperature fluxes and remain spectrally accurate in center wavelength (CWL) and band pass adherence.
No reflections leading to image distortions or "back reflections" All Chroma Astronomy filters are coated on 3.0mm thick substrates,and are parfocal with other Chroma Astronomy filters, with the exception of our LoGlow Light Pollution Filters (27030), which are manufactured on 1.1mm LCD.
All filters are manufactured with durable, sputtered hard coatings using single substrates of the best glass. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission.
All filters manufactured in Vermont.