Hey Rand, as you might know leica m are designed for their mirrorless cameras and thus sport a very short flange distance,
c7 adapters makes a leica m native mount for the Kinefinity KInemount with positive lock.
Leica r lenses, are in my opinion a bit overrated and a bit of a mixed bag. Leica is good with marketing but the only lenses that got to my attention as interesting are the m lenses, and the leica summilux-cine.
As you might know the cine devision leitz made a 0.8 version of the leica m line (not all the models), inmy opinion overpriced, for a simple cinemod and added front OD. But i refer to these lenses because to my humble opinion these curated lenses are the nicest among the leica m lenses. Have a look here https://www.leitz-cine.com/product/m-08
The voightlander apo lanthers are really great lenses and most come also in e mount (kinefinity makes a e-mount), I own the 65mm myslef (macro) and it breaths heavily but both mechanics and optical design are lovely. If your into small cameras, your probably also into small lenses, and the leica m lenses and voightlander tick a lot of boxes. But as you might know these lenses were designed to be still lenses, this means that they are both optically and mechanically compromised, mechanically in terms of focus throw (even though some have quite a throw, they are macro lenses, and largest part of the scale is just focus throw, and they are not basec on cam systems with a more even spread on the scale), also they al breath to quite a large degree, and the wider angles will smear on digital cameras, due to inclining rays through the olpf, so they look better on film, thats due to their somewhat non-telecentric design, that causes the outer ray to project under quite a steep angle, and thus refract more inside the olpf. this causes blur (smear). This happens ofc more on LF than s35 with the komodo, because this happen mostly on the edges of the image circle the lens is able to throw, the edge has quite a thun olpf, due to the high pixel pitch so you get away with it quite well, a 21mm will have lots more of this edge smear, than a 35mm, for lf i would say that from 35mm and up your fine, and for the wider angles stopping down a bit willhelp.
BUt generally I am always looking for small lenses with decent f stop, and I dont need beyond f1.8 t2.2 or something, most cine lenses are big and chunky , and even thats nice on a film set, you might not able to get away with it if you are a improviced shooter like me, who likes to carry along small camera backs, and small camera builds, for handheld style of shooting.
The leica lenses have the leica name, and voightlander has made some truly amazing lenses and bad lenses, so dont always just throw your money at voightlander, the lenses you are referring to are fun, and good, check philpreeves his reviews on it, he’s a trustworthy reviewer, but ofc isnt reviewing them in a context of videoshooting, but from a stills photographer point of view. I myself rarely use wide angles, 50mm and 65mm and sometimes 35mm are my lenses to go on lf. They will all work fine, and I love the vcoightlander apo lantern 65mm, even though it breaths heavily, mechanics are good enough and with a added gearring, you can quite okayish pull focus with it. I myself dont focus pul by hand I use a PD movie remote liveair, and use a thumbwheel controller from the same brand to control focus, like that i can hold two hands to the rig, and i will have a much more stable image, and also focus pulling on short throw stils lenses is a bit smoother as well, due to high resolution of these motors, ofc you will suffer a bit of backlash on these still lenses, but leica m lenses and voightlanders are well made, and mostly all steel build , with low backlash, Hope this helps, if you have any more questions please ask.
