Chroma Technology R-Sloan SDSS Filter

This filter is specifically engineered for the Sloan ugriz photometric system, allowing astrophotographers to capture precise color data at a central wavelength of 625 nm. It is designed to isolate specific light bands for scientific-grade astronomical imaging.

The sputtered coating provides superior durability and high light transmission compared to traditional coating methods. This ensures that more light reaches your sensor while minimizing unwanted reflections and flare.

This is an unmounted, square filter intended for professional astronomical imaging setups rather than standard consumer camera lenses. You will need a compatible filter wheel or housing designed for square, unmounted optics.

While it is a powerful tool for astrophotography, it is optimized for photometric data collection within the Sloan system. If your goal is aesthetic deep-sky imaging, you may find that standard broadband or narrowband filters offer a different visual result.

Unmounted filters are typically used in dedicated filter wheels where space is limited and you need to minimize the distance between the filter and the sensor. Choose the unmounted version if your specific imaging train requires a custom fit or if you are integrating it into a professional-grade filter carousel.