Baader Planetarium 8.5nm OIII CCD Filter, 50X50X3mm Square Unmounted

Explore the universe with the Baader Planetarium 8.5 nm OIII CCD Filter, a high-performance tool designed to deliver unparalleled deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II. This filter is crafted to provide the highest contrast images with the shortest possible exposure times, making it an ideal choice for astrophotography enthusiasts.

The Baader Planetarium OIII CCD Filter stands out with its ultra-narrow bandwidths that offer extremely high transmissions. It is designed to completely reject light pollution and effectively block longer wavelengths, ensuring that your celestial observations are as clear and detailed as possible.

The high optical quality of this filter ensures no loss in sharpness or contrast. Each substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface. This unique custom polishing operation sets Baader filters apart from the standard commercially precision-polished filter substrates used by most other filter manufacturers.

The coatings on the Baader Planetarium OIII CCD Filter are professionally applied using the most advanced equipment available, ensuring high consistency for bandpass centering and transmission. The ultra-hard ionbeam deposition ensures the coatings will never degrade from use or normal cleaning.

One of the key features of the Baader coatings is their ability to eliminate the annoying reflections often present in other narrowband astro-filters. This freedom from reflections, along with excellent out of band blocking, is achieved through careful design and rigorous testing of the coating stacks.

The anti-reflection coatings are designed to prevent halos and are balanced to prevent physical deformation of the optically flat substrates. Each filter is coated individually, permanently sealing the coating edges, to guarantee lifetime coating durability and uniformity. Unlike filters that have been simply cut out of pre-coated sheets of glass, Baader mil-spec coatings won't degrade, peel, or flake off, ensuring your filter's longevity and performance.

Experience the difference with the Baader Planetarium 8.5 nm OIII CCD Filter, a top-tier tool for capturing the beauty of the cosmos.