COKIN CREATIVE - Adaptor ring for Hasselblad B 70 M (P Series)
Allow to use CREATIVE Filter-Holder on your lens - Medium Size (P series)
Available in several diameters, adaptor ring will allow you to use your filter-holder on your favorite lens. The front diameter is usually printed on the lens, you can also refer its manual. Just screw the ring, insert the holder and some filters, then start shooting.