We allow small tolerance between the lens and the lens holder to avoid wobbling of the lens when it is assembled into the camera.

The lens and the lens holder should be aligned pretty well for the lens to be inserted smoothly.

One trick to insert the lens is;
- Align the lens with the lens holder so that the axes are in-line.
- While the lens is touching the lens holder, rotate it counterclockwise very slowly , i.e., in the direction opposite to be inserted.
- When the lens and the holder are aligned well, you can feel a tiny "click".
- Now, you rotate the lens clockwise gently, i.e., in the direction to be inserted into the holder.

The lens holders of oCam-1MGN-U are all same, one type and one dimension.
If you want, you can send us the camera and your lens so that we can check the alignment and insert the lens for you.