Bay 104 Filter Holder for Rolleiflex 6000 and Hy6 lenses
This is an adapter that fits the outer bayonet on all lenses with bay 104 hood mount - 50mm f/2.8, 90mm, 180mm, 300mm, 55mm PCS, etc. This takes 100mm wide or square filters that are 1mm in thickness or less. There are two pins at the bottom of the holder than prevent a filter from sliding out inadvertently, however they can be pushed back to the back side to allow a graduated filter to be slide further down if needed. Note: Use of this filter adapter precludes using a hood.