This fits the FW, FT, and FX-N models as well as older models with bay IV filter mount.
This is a locking swivel filter attachment that mounts to the camera body and accepts any E 58 screw mount filter. It works with both earlier and current Rolleiflex cameras that have a size IV bayonet mount. This adapter allows photographers to swing the filter to the taking lens for composition and a view of the filter effect and then the filter can be quickly swung back down over the taking lens for the shot. This is particularly useful with a polarizing filter but also with black and white photography filters. The filter adapter allows the use of the larger variety of filters that are available in standard threaded mounts and often at lower cost than Bay IV filters. While the metal Rolleiflex bay IV shades will not fit directly onto threaded filters, an aftermarket screw in hood can be used mounted to the filter.