1PCS S8323 M48 to M42 for QHY ZWO back focal length 55mm flat field mirror
S8323 can have built-in filters
M48*0.75 internal thread
42*0.75 external thread
Extension: 37.5mm
Suitable for astronomical cameras such as QHY and ZWO, M42 internal thread camera, back focus: 17.5MM back focus camera
Link M48 external thread, back focal length 55mm flat field lens, focus reduction flat field lens and MPCC
55mm-17.5mm=37.5mm
Packing: 1PCS
Warranty period: 120 days