For sale: This adapter allows one to attach a CF22/CF39 (for H1, H2, H2F, H4X cameras) to Sinar and Horseman 4 X 5 cameras. Excellent condition, Kapture Group brand. If you need further explanation of this adapter and to see how it works, go to the Kapture Group website and look at its listings of "Live Video view camera adapters." The one I have listed is for the Hasselblad H Series. Make me an offer.