Hayk

Do you need HDMI loop through? If so, the Portkeys has it. Atomos and SmallHD do not which is their major downfall for me. 
The LH5P is a nice monitor and I use it for gimbal work. It’s nowhere near as easy to use as my SmallHD 702 Touch as that has a great menu system compared to the average one on the Portkeys but the image of the LH5P is nice and bright enough for outdoor use. I also like being able to control my Pocket6K pro from the LH5P screen. Means rarely having to touch the camera when on the gimbal. 
I think the LH5P is the one to get of the monitors you mentioned and you will get used to the clunky menu system after a bit of use. 
 

Guess a good way to buy that new camera you want without your wife knowing 😄

Buy Tesla with bitcoins, give me Tesla, I give you camera 😎

No, you'd just go through Lee directly for that.

Because they're Saramonic? That's my first and second guess as to why. 

Still, if that's your worst complaint, that at least means they're doing a million miles better than their total screw up that was their initial release of the UWMIC9

Portkeys BM5 with the Bluetooth-Module

I'm a bit confused about your use of the phrase 'cine'....
The things that separate cine lenses from other lenses are that cine lenses have things like:
same weight across whole set (so that you don't need to re-balance rigs when changing lenses) same size front filter size across whole set (so that you don't need to adjust filter setups when changing lenses) aperture / focus gears so these can be connected to a follow-focus same location of manual control rings across whole set (so that you don't need to adjust follow-focus controls when changing lenses) de-clicked apertures parfocal same coatings across whole set (so that shots and flares aren't visually very different when changing lenses) same resolution across whole set (so that shots aren't visually very different when changing lenses) etc Which of these are you interested in?  You don't seem to be interested in all of them.

At a quick glance it might be useful for people to see what's available that shoots 4K - everything stills-video (not camcorder), with a large-ish sensor and 4K video. Here's my list off the top of my head. I'll add to it based on your suggestions and I've missed!
Full frame 4K
Canon 1D X III Canon EOS R5 Canon EOS R6 Leica SL2 Leica Q2 * Nikon Z6 Nikon Z7 Nikon D850 Nikon D780 Panasonic S1 Panasonic S1R Panasonic S1H Sigma Fp Sony A7 III Sony A7S II Sony A7S III (Soon) Sony A7R II Sony A7R III Sony A7R IV Sony A9 Sony A9 II Sony A99 II * Fixed lens 28mm
Full frame but cropped 4K
Canon 1D C (1.3x) Canon 1D X II (1.4x) Canon 5D Mark IV (1.8x) Canon EOS R (1.8x) Canon EOS RP (1.8x) Leica SL (1.5x) Nikon D5 (1.4x) Super 35mm full width 4K (APS-C)
Canon M6 Mark II Fuji X-H1 (slight extra crop) Fuji X-T2 (slight extra crop) Fuji X-T3 Fuji X-T4 Fuji X-T20 Fuji X-T30 Fuji X-Pro 2 (Firmware update) Fuji X-Pro 3 Fuji X-E3 Fuji X-A7 Fuji X-T200 Leica TL2 (no 24p, 30p only) Leica CL (no 24p, 30p only) Nikon Z50 Sony A6100 Sony A6300 Sony A6400 Sony A6500 Sony A6600 Samsung NX1 Micro Four Thirds 4K
Olympus E-M1 II Olympus E-M1 III Olympus E-M5 III Olympus E-M10 III Olympus PEN E-PL9 Olympus PEN E-PL10 Olympus E-M1 X Panasonic GH4 (2.3x crop) Panasonic GH5 Panasonic GH5S (1.86x extra wide sensor) Panasonic G9 Panasonic G7 (2.3x crop) Panasonic G85 (2.3x crop) Panasonic G90 (2.3x crop) Panasonic GX9 (2.5x crop) Panasonic GX8 (2.5x crop, old model not recommended for video) Panasonic GX85 (2.3x crop) Yi Mi 2x crop 4K or more from APS-C sensor
Canon M50 Canon 90D Canon 250D  Nikon D7500 Nikon D500 Samsung NX500 Fixed lens and crop sensor
Fuji X100V Canon G7X III Canon G5X II Leica D-LUX (LX100) Leica D-LUX7 (LX100 II) Leica V-LUX (FZ1000) Leica V-LUX5 (FZ1000 II) Panasonic FZ1000 Panasonic FZ1000 I Panasonic FZ2000 Panasonic LX100 Panasonic LX100 Mark II Panasonic LX10 Sony RX100 series (from M4) Sony RX10 series (from M2) Sony RX0 series Medium format 4K
Fuji GFX 100 Hasselblad H6D 100C Hasselblad H6D-400c Leica S Typ 007 (Super 35mm crop only in 4K) Leica S3 ---
List updated: 13th July 2020
No pro video cameras. Has to be a stills camera and be able to shoot 4K. Can be either DSLR or mirrorless.

There is no adapter with image stabilization.
You will need a lens with image stabilization such as IS, OS, or VC based on the manufacture. In my opinion, Canons IS system is the smoothest and doesnt 'jerk' the video. As far as speedboosters, i believe metabones autofocus faster but the difference is negligible compared the cheaper viltrox. 
There are many tips on how to get stable footage handheld. The most important would probably be weighing the camera down with a heavy battery and a adding a cage or a better grip. Neckstraps, tripods, and gimbals are other options.
I also believe there are some companies like steadxp(?) using gyroscope technology which is pretty amazing but you are limited in some shooting modes and will add to your post production time.
If none of these answers satisfy , m4/3 cameras have the best IBIS, although nothing compares to HyperSmooth by gopro.
 
Everything has a trade off unfortunately. 
 
 

Most likely making your interviewee look good will be your top priority, so some sort of diffusion is a must (be it a Light Dome from aperture or some generic soft/octaboxes - both will do). Adding a grid to the abovementioned softbox, so that you can control its spill, is also a good idea. 
I'd say that a fresnel is a more specialized tool and probably you wouldn't use it that much, especially during interviews. 

Didn't wanna make a new thread for just memes.. 
??

This is a bit like asking "is Bugatti making an affordable car for soccer mums to drive?" 

Technically they could, but I'm almost certain they will not. Because it would absolutely ruin Bugatti's brand image and everything they've been doing in trying to craft that. 

The ARRI Mini & AMIRA was their "cheap" cameras. (and they are, relatively speaking. Just compare their price to an ALEXA SXT W)

Their "certified ARRI" refurbished programming selling ARRI ALEXA Classics are their "cheap cameras".

I see it as extremely unlikely ARRI will bring out a brand new camera priced under $10K, and the chances of them making a sub $5K camera? Nil!

However for RED, it is somewhat less surprising (it could be argued the surprising factor is why hasn't RED done this earlier?). Because it has ALWAYS been part of RED's branding that they're the "affordable / budget value" option. That is how they've positioned themselves from Day #1. (of course back when RED launched, a camera could be very very expensive and still be massively cheaper than the cinema cameras from competitors! And with time RED trended up into the higher end markets, but even then RED still presented themselves as "giving you more for your dollar, that their cameras could do more and thus are better value)

Minor side note: I do remember years ago there being serious talk/rumors about ARRI making an "ALEXA Academic Edition" camera. Which would have been identical to their full size ALEXAs but limited to only 720p and only allowed to be sold to educational institutions.
This did make a lot of sense I thought, by limiting it to 720p they're still protecting their branding/value/pricing strategy for the commercial sector, event though this variant would be sold at a much cheaper "educational pricing". While at the same time, getting in to catch them young a new next generation of filmmakers while they're still at film school. Get them learning on and loving ARRI cameras, ready and experienced to use them as soon as they graduate, instead of having the universities buy RED Epics for their students to learn on. 

Is a pity it didn't happen, and I don't think it would make sense to do this now. But perhaps if after the ARRI ALEXA Mini 4K S35 gets launched this year (which ARRI has signaled in advance already that it will happen, 2020 is the year they're launching their brand new S35 4K sensor) then an "ALEXA Mini 1080" (using the original 3.2K sensor, but limited to 1080, and with a body identical in design to the Mini) at special "academic pricing" (exclusive to educational institutions) could be a smash hit with students. 

I think that Arri are currently quite comfortable concentrating on and dominating the high end market.

Yeah I don't think they care about the low end market. I have a friend that works at a rental house in LA and he says the Alexa Minis are still the 1st pick.

RED's reputation has been hurt recently, so it makes sense for them to try to grab lower end customers with a cheaper camera that uses non-proprietary accessories. People thinking "RED sucks it's so overpriced" will probably be ok with the Komodo since it's so much cheaper. People who own one will likely stick with RED and upgrade to something more expensive later. It's what Mercedes does with the CLA or A class, for example - They're grabbing younger people with less income and building brand loyalty for later in life when the same customers have better paying jobs.
Arri's reputation has been, and probably always will be, that it's just the best option for most situations. Part of that prestige is that the price makes it inaccessible by all but the highest budget productions.

The A7iii is a good allround video camera and really excellent stills camera (I do own it), but no cinema camera because of its weak codecs and 8bit limitation, no matter how you rig it up.

Speaking as a  former a7iii user, I can echo what others have said. You don't gain anything from recording externally with the a7iii. 
Really, the only thing that the a7iii has over other cameras is video AF.
It's a great camera but you're not going to gain much from rigging it up.

Wanna get the highest video quality with Sony A7III camera and turn it into "Cinema Camera"! So which brand accessories should i buy for achieving best quality?
1. External monitor for recording with the highest frame rate & please  add your suggested settings for external video shooting.
2. SSD or SD for your mentioned external monitor. 
2. Rig/Cage.
3. Follow Focus for manual and for wireless using.
4. Matt boxes.
5. Power supply (V mount/Gold Mount/or)
6. V mount/Gold Mount/or Lock plate
7. Wireless transmitter so the director or focus puller can see the image
If there is something that i forgot, but you advise me to use or add, please tell me, thanks.
 

Wanna get the highest video quality with Sony A7III camera and turn it into "Cinema Camera"! So which brand accessories should i buy for achieving best quality?
1. External monitor for recording with the highest frame rate & please  add your suggested settings for external video shooting.
2. SSD or SD for your mentioned external monitor. 
2. Rig/Cage.
3. Follow Focus for manual and for wireless using.
4. Matt boxes.
5. Power supply (V mount/Gold Mount/or)
6. V mount/Gold Mount/or Lock plate
7. Wireless transmitter so the director or focus puller can see the image
If there is something that i forgot, but you advise me to use or add, please tell me, thanks.
 

I use mspaint and  working too.?

Go to image size, set mode to percent and set the width to 133%, leaving height at 100% if you want to maximize image size. you can also leave the width at 100% and set the height to 75%.

to generalize i think with 16/9 you can squeeze it 1.33 times and 4/3 you can  squeeze it 2 times . you could also squeeze 16/9 2x however you would have really wide video and have to crop it later you would probably have wider black bars top and bottom as well. thats my limited understanding of  hows it works hopefully someone more knowledgeable will chime in shortly with a more technical reply. i might go read andrews reids anamorphic ebook again it may have some info that would be relevant.