Have you tried looking into buying a used Blackmagic Pocket (version-1). People are now selling them for about 500-800 on Craigslist or OFFERUP app. Some come with adapters for canon EF or Nikon lens. You most definitely will get a Super16 look and feel, especially if your using old Nikkors. Yes, I also agree with getting a Tiffen Black Pro mist 1/2. If you ever get a chance to read some of the old ASC cinematographer articles from the early 2000. You will see that many of the OG cinematographers from the past (70's,80',90's.) Used filters on their lens because they didn't want the sharpness. If you can, I strongly suggest trying to get a used Blackmagic pocket or even a Blackmagic 2.5k.
Till this day I really regret not buying a Bolex D16 monochrome camera. I was close to getting one , I used to eye that thing on their website all the time. Now Its hard to even find one on eBay or Craigslist. Besides I'm no longer in the market for a camera that cost 3-5grand at the moment. I'm hoping I can get my hands on a monochrome camera some day.
I use a Sound Devices 702T and really love what their products can do. I used to have a Mix Pre-D. Thats another awesome tool. I would rather get this than a Zoom F4. I really feel more comfortable that this has analog limiters unlike the Zoom F4. I knew Sound Devices was in the works for new products because they have discontinued many of their 7 series models. I hope to see more from them soon.
My guess that Canon is going to give the 5D mark 4 a firmware upgrade is because it is rumored via (Peta Pixel) that Magic Lantern has been able to " hack " into the mark 4. Ofcourse after the announcement of the 5D mark iii and its 4k firmware probably doesn't make Canon comfortable. I'm hoping it will be a bit more than a C-Log upgrade. If so, I might just buy it.
I bought the app. The log mode is really grainy. ( I've only tried it indoors, but had plenty of light). The Natural settings is really nice. The App upgrade is worth it.