The Ultra High Contrast (UHC) broadband filter has been designed to improve the visibility of various deep sky objects.
This is achieved in part by reducing the transmission of wavelengths of light pollution, especially from artificial lighting, including mercury vapor lamps. But also blocking the emission of sodium vapor lamps and the harmful sky glow effect. Together with the highly transparent transmission lines OIII (496 nm and 500 nm), H-beta (486 nm), NII (654 nm and 658 nm), H-alpha (656 nm), and SII (672 nm), this filter is perfect for improving contrast and details for visual and photographic uses, in areas with strong light pollution.
Main benefits and uses
Suitable for unmodified color CCD and DSLR cameras
The UHC filter with a reduced width of the bandpass range, offers a higher contrast than the CLS and is therefore more suitable for the city environment, subject to higher atmospheric pollution.
The UHC filter has a remarkable red bandpass range and thus enables exceptional photographic recordings of objects such as the Orion Nebula (M42)
Light pollution filters do not increase the brightness of objects and cannot exclusively remove the effects of light pollution. In many cases, however, they increase the contrast between the nebula and the night sky.
German-made brand glass substrate, 1.0mm thick
Multi-layer anti-reflective treatment, deposited by electron beam evaporation and ion beam assisted deposition
Precision optically polished substrate to 1/4 lambda and <30 arc seconds of parallelism on both sides
60/40 polish quality per MIL-O-13830 specifications
Uniform and precise coating method that guarantees high pass band transmission and precise out-of-band blocking
Attention, this filter must never be used only to observe the Sun!
This item is not available to customers in Germany.