Whilst stripping down the lens for bleaching back the rear element and cleaning the elements, I decided to have a little play with the front elements. It look like it could make a rather nice soft focus lens. Now while I currently don't have any film to expose (or a large enough back, it does look like it may cover 10x8 or larger). Just wonder if anyone else has explored this further than I have just dabbled - how would I work out the focal length and equivalent aperture? From the distance required to focus an image on the wall it appears to be in the 240 - 300 range. Hopefully I can cobble together a panel later on today and perhaps sacrifice a sheet of type 55. . .