This is the replacement 35mm insert for Mamiya's 135 Roll Film Holder (HC401) for the 645 Pro, Pro TL and Super cameras.
Note:
This insert will only fit in the 135 Roll Film Holder. It will NOT fit any of the 645AF (auto focus) backs
This insert provides an image size equal to a traditional 35mm negative measuring 24 x 36mm
A panoramic adapter slide can be used in conjunction with this insert to create images measuring 13 x 36mm