Optolong H-Alpha 3nm CCD 36mm Unmounted Filter
Optolong H-Alpha 3nm CCD Filter - 36mm Unmounted
The Optolong H-Alpha 3nm CCD Filter corresponds with the RGB channel, allowing imagers to process Hubble images with post-processing astrophotography software. Optolong uses a multi-layer, anti-reflection coating on the filter. It uses a non-cementing optical substrate coating, applied through precision Ion-based deposition, providing durability and resistance to scratching. It also provides stability on the central wavelength so there is no deviation depending on temperature change. Their planetary rotation system gives precision and homogenous coatings to ensure high-value pass-band transmission and off-band optical density.
The Optolong H-alpha filter is narrowband and allows a 3nm bandwidth of light, centered on a 656nm wavelength, through. This popular type of filter is perfect for those looking to have better contrast and the ability to capture subtle nebula details.
About Optolong
Optolong is the Astronomy Filters division of Yulong Optics, an optical filter design and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.