High compatibility; Compatible with ZWO cameras, Astromania telescope eyepieces, filters, NEEWER filters, Alstar filters, OPTOLONG filters, FIBONAX filters, Celticbird filters, and most other telescope accessories on the market Double pair of magnets; SV226 telescope accessories compared with traditional screw rotation; magnet has stronger adsorption force; which is convenient for you to install and use Two filter holders; SV226 telescope photography accessories compatible with 2"&1.25" filters; capable of holding two telescope filters; plug and play; reducing repeated installations in dark environments Locking function; lock screw can adjust the tension to eliminate the gap; solve the light leaking issue under long exposure; which is a double insurance for you M42-M48 adapter; camera side thread is male; filter mounts thread is female; you can use the adapter to coonect cameras of different specifications;M42 is internal thread; M48 is external thread CNC integrated molding; more precise production process; strong and sturdy; you can use telescope accessories with confidence 21mm thickness; the thickness is related to back focal length; back intercept affects the quality of imaging; it limits the use of accessories and optical path length Use with telescope; SVBONY SV226 telescope photography accessories can connect the telescope to the focal reducer and drawer filter; then connect the adapter to the camera SV226 telescope accessories 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 wheel 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