hi mark
yes, i know, your thread here is 9 years old ! but there is an seminat on eBOINk right now too.
i've had one for 12 years and have made some really nice images with it. i figured out a way to focus,
to coax the softness out of the lens. there isn't a lot written about the seminat, there is only one as far as i know
and it is the 3.5 ... but i have seen ads &c for it as a movie lens in addition to a still photography lens.
mine is in a very old shutter.