Currently ZWO only provides M42 All-in-one pack for the QHY183M. Different from other kits, all adapters/spacers in this pack share M42 screws rather than M54.This kit ONLY suits the combo of QHY183M+CFW3S-US/CFW3S-SR+OAGS.Below lists some examples of using the kit (M42 Nikon/Canon adapter not included in this pack)

Note: this kit also suits other cameras with sensors one inch or smaller (e.g., QHY183/178/174/290).