SV226 filter drawer adopts integrated CNC molding and anti-light leaking design. It can also use 1.25" & 2" specifications on the market. Easier to install and pull out, but also provides effective installation protection, no need to worry about damage to the filter. Advanced CNC integrated molding processing, quality assurance. Thickness affects back focal length, which affects image quality and available accessory options. SV226 filter drawer can use with SV550 SV503 OTA or SV405CC SV605CC camera. The packaging is equipped with a plastic storage box to ensure that accessories around the filter drawer can be stored. The filter drawer comes with the M42-M48 adapter to resolve the thread compatibility issue. The interface can compatible with astronomical cameras of different specifications. SV240 Multi-Narrowband Galaxy & Nebula Filter NIR Near-infrared Light Pollution Filter; A new galaxy and nebula filter intended for shooting not only nebulae, but also galaxies by the use of the transmittance around the near infrared region. Considering the high quantum efficiency (QE) characteristics of the latest cameras (such as IMX585 and IMX464) in the near-infrared region and taking into consideration that this region is less susceptible to artificial light pollution, the filter adds high transmission in the near-infrared (NIR) band. This spectrum design improves the image signal-to-noise ratio and contrast by capturing signal in visible bands and NIR regions while maintaining good colour balance and being easier to manage in post-processing.