Hello cinematographers! First post; happy to be here. I'll be jumping right in.
I recently rewatched The Terminator (1984). According to IMDB the movie was filmed on 5293 film stock with ARRI 35BL and Mitchell 35R3 cameras that were each equipped with Zeiss Super Speed lenses. But a particular scene (the repair scene) caught my eye because of its distinctive double-bubble bokeh that I don't believe could have been created by any of the Super Speeds, at least by themselves:
There is only one lens that I know of that produces bokeh that's at least extremely similar if not identical to this - the Kilfitt / Zoomar Makro-Kilar 90mm f/2.8. An Arri Standard mount adapter was available for this lens and it did see some use in the industry (most notably, Stanley Kubrick apparently had one in his arsenal). From what I can gather from information online, the consensus is that this particular lens renders out of focus specular highlights in this manner due to a lens element that was "biradially ground" - it's not quite an aspherical lens, but it's a two-step approximation of one. I know at least some of the Super Speeds employ aspherical elements so in some situations they'll produce onion-rings / bullseye in bokeh balls, but nothing quite as drastic as what's shown above.
I'm pretty convinced this scene was shot with a Kilfitt 90, but there is no documentation of this online that I can find, and I'm also wondering if there are other ways to get bokeh like this that would hopefully be easier to come by -- if I could pop a diopter or filter on a lens I already own to play around with this, I'd be a happy camper! I posted in the Adapted Lens Talk forum at dpreview but the thread is dying without a satisfying end.
Are there any other lenses out there that do this or do I need to seek out a 90/2.8 Makro-Kilar to be able to play around with this bokeh?
Are there any filters or lens attachments that could indirectly be the culprit? Hopes aside, I ask because Tiffen Low-Cons came up in a previous thread.
Are there any other movies you've seen where you noticed bokeh like this?
Any other theories?
Thanks for your thoughts!