Description
M42x0.75mm thread The Male thread and female thread of this M42 extension tube are M42x0.75mm,which can attach any M42X0.75mm telescope camera adapter.5mm 10mm 15mm 20mm 4 Pieces Length The required spacing can be achieved by combining several extenders of differing lengths. You can use 1 piece, 2 pieces or 3 pieces of the extension rings as you like to meet your different needsble Fully metal construction and anodizing aluminum process that makes the M42 extension tube durable and not easy to deformification: Type: Astronomical M42*0.75 thread Extension Tube Material:metal Male thread: M42*0.75mm Female thread: M42*0.75mm Color: Black Length: 5mm 10mm 15mm 20mm