M42 Female to M42 Male Adapter Ring Aluminum, Astronomical Telescope Photography Extend Ring 1 Piece

Product Parameters:
Name: M42-M42 adapter ring Extend Ring
Material: Aluminum alloy
Male Thread: M42*0.75
Female Thread: M42*0.75
Interface thread: M42*0.75 and M42*0.75 (Both joints are the same)
(The number is the netextending length, like 30mm, 30mm is the extending length and the total length of the ring is a little longer than 30mm.)
Fit for: astronomical telescope photography.
Use: extend

Product Features:
1. Suitable forastronomical telescope photography;
2. Strong and sturdy;
3. Strong versatility;