ZWO LRGB Imaging Filter

No, you do not. These filters feature built-in infrared blocking from 700nm to 1100nm, so you can achieve sharp, focused images without adding an extra IR-cut filter to your imaging train.

These filters are specifically designed for monochrome astronomy cameras. Because they require you to capture separate luminance, red, green, and blue data to assemble a final image, they are not compatible with one-shot color cameras.

The filters are engineered with a specific gap between the red and green bands, which helps suppress light pollution commonly caused by sodium street lamps. This design choice helps improve contrast in your deep-sky images when shooting from suburban or light-polluted areas.

Yes, they feature standard M48x0.75 threads, making them compatible with most common filter wheels and drawers designed for 2-inch filters.

The overlap between the blue and green channels is intentional. It allows the filters to capture OIII emission lines more effectively, which results in more natural and accurate color rendering for nebulae.

The optical glass itself is 1.9 mm thick, while the total mechanical thickness of the filter is 5 mm. This is a standard profile that should fit easily into most filter wheels without causing vignetting.