Available in M42x0.75 or M48x.75 on both sides. T2 thread extension tube with T-mount thread (M42x0.75) often found on telescopes and photographic accessories.
The adaptors are black anodized to keep down reflections.
M48 to M42 T Thread adapters to match threads from some field flatteners for CCD and CMOS cameras.
The M42 - 1.25"/M42 extension is perfedct for getting that extra little bit of back focus. Used on the Starfield Guide Scope for cameras that have trouble achieving focus. M42 threads on one end, and a compression ring with 3 screws for a secure fit.
Made out of aluminium and machined for a precise fit.