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If you need a specific back focal length, you can use QHYCCD's All-In-One adapter kit to combine your own set of spacer rings to meet your particular requirements.

Kit Content

  • 8mm M42 to M48 Adapter*1
  • 3mm M42 Screwed Adapter*1
  • Cam Top Adapter (original name 020063)*1
  • 0.5mm/1mm/2mm/3mm/7mm/10mm Spacer*1 21mm M3 Screws*8
  • 10mm M3 Screws*8
  • 12mm M3 Screws*8


  • QHY183M
  • CFW3S-SR
  • CFW3S-US
  • OAG-S