Plastic bajonet lens f=150mm. d=26mm.

Plastic Acrylic Lens.
Focal distance 150 mm.
Visible diameter 26 mm. (part where you are looking through)
Mounting by Bajonet system. By means of small slots in the cardboard you can 'screw' the lens in the cardboard.
Excelent and well produced lens without moulding failures.