• Front side - M42x1 female thread
• Rear side - M26x1 male thread

Machined from high quality aluminium alloy.

This adapter allows using M42 lenses on Robot cameras with M26x1 lens mount. Infinity focus will be provided.

Improvement over a simple version is that this adapter has a bronze insert.

This allows adjusting a lens witness mark to the desired position (to the top usually). Also, you may add some shims under the insert if your lens overruns past infinity.

BE CAREFUL! Robot cameras had many different mounts, and even 26mm thread can have different pitches. Internet sources say that older cameras have M26x0.75 thread while newer cameras have M26x1 thread. Please measure your mount diameter and pitch before purchasing the adapter.