new design screw on adapter
your lens must have a back thread that is undamaged.
super safe screw on adapter

only for kowa prominar 16s and kowa prominar 16d only
your 16d and 16s must say kowa prominar for these to fit properly.
this has a super safe internal thread so you screw onto kowa back thread

please contact me to make sure your model is correct.
superb new design 52mm colours black or red

nice custom perfect fit solution.