M43 43mmx0.75 to M48 48x0.75mm Thread 43-48 Camera Lens Adapter Ring

M43-M43 43mm x 0.75 Dual Female threaded camera lens adapter ring

M40 40mmx1mm female to M42 42x1mm male Thread M40-M42 Camera Lens Adapter Ring

M34 34mmx0.5 to M48 48x0.75mm Thread 34-48 Camera Lens Adapter Ring

M48*0.75 Camera T-Ring Telescope Photography Adapter for Canon EOS-EF Camera

M58-M58 58mm x 0.75 Dual Female threaded camera lens adapter ring

M58-M60 58mm x 0.75 60mm x 0.75 Dual Female threaded camera lens adapter ring