>>4466286On the imagon it is infront of the glass a couple inches. Look at
>>4466148 diagram. The fujinon version has them inbetween and right in front of the normal aperture. These fujinon soft focus lenses are suprisingly inexpensive, but not nearly as versatile as the imagon.
If you made a little disk that fits onto the front of a UV filter I bet it would work. Easy to 3d print too.