Baader Planetarium F/2 Sulfur-II High-speed Narrowband Filter, 31mm Round, Unmounted

Enhance your astrophotography experience with the F/2 Sulfur-II High-speed Narrowband Filter, a 31mm round, unmounted filter from Baader Planetarium. Specifically designed for use in fast optical systems such as Celestron's Rowe-Ackermann Schmidt Astrograph (RASA) and Starizona's Hyperstar systems, this high-quality filter is a game-changer in the field of celestial imaging.

Traditional narrowband filters often result in significant transmission loss due to the strong center wavelength (CWL) shift. In extremely fast cases, the CWL can even shift out of the filter's full width half maximum (FWHM) transmission. However, this innovative S-II filter has a CWL-preshift that perfectly aligns with f/2 to f/3 optics, effectively eliminating this issue.

Despite the typical line broadening associated with fast optical trains, this durable and reliable filter delivers maximum contrast, allowing for more vivid and accurate colors in your images. It's specifically designed to enhance high contrast emission nebulae imaging, making it an essential tool for any serious astrophotographer.

Experience a dramatic improvement in your astrophotography when using this filter between f/1.8 and f/3.5, compared to regular sets of narrowband filters. With the F/2 Sulfur-II High-speed Narrowband Filter, you can truly harness the power of fast optics and capture the beauty of the cosmos in stunning detail.