Astronomik OIII CCD Narrowband Filter

A 6nm bandwidth is quite narrow, which is excellent for blocking out light pollution and moonlight. This allows you to isolate the specific Oxygen III emission lines from nebulae, resulting in significantly higher contrast and sharper detail in your astrophotography.

While it is optimized for CCD imaging, this filter will work perfectly fine with modern CMOS cameras as well. The optical performance remains consistent regardless of the sensor technology, provided your camera setup can accommodate a 36mm mounted filter.

Yes, this is an unmounted or mounted 36mm filter, so you will need a filter wheel or drawer that specifically supports 36mm round filters. Ensure your equipment is compatible with this diameter before purchasing to avoid fitment issues.

This filter is highly effective in light-polluted environments because it only transmits the specific wavelength of light emitted by OIII nebulae. By cutting out the wavelengths associated with artificial street lighting, it allows you to capture deep-sky objects that would otherwise be washed out.

The 10-year warranty covers manufacturing defects and issues related to the optical coating's integrity under normal use. It provides peace of mind that the filter's performance and durability are backed by the manufacturer for a decade.