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. Package Includes: Drawer Frame x 1PCS 2" Filter Slider x2PCS 2"-1.25" Filter Adapter x1PCS M42F-M48M Adapter x 1PCS Plastic Case x 1PCS 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. Brand: SVBONY; Model: SV219; Length: 8.26in / 210mm; Function: V-Style Dovetail Plate; Surface Treatment: Black Anodized finish; Width: V- Standard; Material: Aluminum Construction