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. The dovetail plate provides a platform for coupling telescope to equatorial telescope mounts that have a v-style saddle. The dovetail plate is important for your mounting requirements, and will add stability and safety to your astronomical equipment setup. This dovetail plate attaches to the saddle of a wide range of mainstream V-style mounts and "narrow-style" dovetail plate also works well with various smaller alt-azimuth mounts. This V-Style dovetail plate mounts bolts with a continuous groove that easily accommodates any bolt spacing and balance needs. The dovetail plate is housed precision machined from aluminum alloy and black anodized to a hard finish and the dovetail is more durable and the service life is extended.