With modern interference filters, amateur astronomers can now achieve excellent image results. The applications include narrow-band emission line filters, broader-band color filters and filters for suppressing artificial light emission.
Multi-Layer Anti-Reflection coating to reduce star-halos and reflections from camera optical window.
Batch-tested for consistency.
Ultra-flat glass by Schott Germany. 1.85mm Glass 30sec parallel, optical polish to MIL Spec. MIL-O-13830.
High quality dichroic/dielectric coatings. Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength). No deviation affected by temperature change.
UV/IR block for imaging - star bloat reduction with refractors.
Precision CNC machined filter cell for strain-free mounting and freedom from tilt.
SkyTech Quad-Band EOS Clip Filter for DSLR cameras (including astro-modified) Narrowband Bi-Colour imaging is a growing new trend in astrophotography, especially popular in light polluted areas, or for imaging in rural areas in moonlight.
The Altair Astro Premium Oiii 6.5nm filter is designed for astro imaging of nebulae with Mono CCD or CMOS cameras, blocking light pollution by cutting out the light pollution wavelengths. The filter blocks UV IR and has an anti-reflection AR coating.
The Altair Astro Premium Sii 6.5nm filter is designed for astro imaging of nebulae with Mono CCD or CMOS cameras, blocking light pollution by cutting out the light pollution wavelengths. The filter blocks UV IR and has an anti-reflection AR coating.