Chroma Technology Luminance Filter

This filter is designed to capture the full visible spectrum of light—from 400 to 700 nm—while blocking unwanted ultraviolet and infrared wavelengths. It acts as the 'L' in LRGB imaging, providing the high-resolution structural detail and luminance data that you later combine with color data from red, green, and blue filters.

This is a 2-inch mounted filter, which is a standard size for most modern filter wheels and imaging trains. Before purchasing, verify that your filter wheel or drawer is compatible with 2-inch mounted accessories.

Many telescope optics do not focus ultraviolet and infrared light at the same point as visible light, which can cause 'bloating' or soft, blurry edges around stars. By blocking these wavelengths, this filter ensures your images remain sharp and high-contrast.

While technically possible, this filter is specifically engineered for astrophotography. Its bandpass is optimized to maximize signal-to-noise ratios for digital sensors, so you will get the best results using it as part of a dedicated LRGB imaging workflow.

Yes, it is designed to integrate into standard LRGB filter sets. However, for the most consistent color balance and focus performance, it is generally best practice to use filters from the same manufacturer or series whenever possible.