SII+OIII: Colour Magic C2 Duo-band filter (SII+OIII) has a high transmittance of over 90% at its center wavelength (500.7nm and 672nm). It can effectively improve the quality of the image by making the sky background of the image darker while maximizing the contrast throughout the image, enhancing the contrast of your pictures, and making it easier to display the details of the stars.
ASTROPHOTOGRAPHY: This filter can improve the contrast when observing gaseous nebulae and planetary nebulae under any sky conditions,even in places with light pollution, high contrast observation effects can be achieved
LIGHT POLLUTION REDUCTION: Telescope astronomy filters can effectively reduce the interference of artificial light pollution such as city lights, natural light sources or street lights, facilitating better observation,this filter can also selectively filter light pollution and cluttered signals through the emission lights of the nebula to achieve the ideal shooting effect.
EASY TO USE: Dual-band filters can completely blocks virtually all other visible wavelengths of light so views of nebulas are optimized and reduce the difficulty and tediousness of user post-processing, reducing the difficulty for customers to get started
BETTER IMAGE: After using this filter, it can produce an extremely clear and sharp effect image, so this narrow band filter is considered one of the most popular astronomical accessories. It can be used not only for astronomical observation, but also for astronomical photography.