Dope Tech Episode 2

<<@arwengrune says : Great video! I'd love to see a video where you use other lenses. There are so many great older lenses, and folks have them collecting dust. How's about some of those mounted on a Pi? 📸>> <<@ark66 says : You didnt tell us where u got the 60 mm lens :)>> <<@JustinFrost302 says : @ExplainingComputers how do you set it permanently to where it automatically set it while it booting up>> <<@dbf1dware says : I would definitely welcome a video on attaching "standard" lenses such as Canon EF-M to the CinePi. That would be cool to see you try out other lenses. There are tons of folks out there who already have cameras with these lenses, so the expense would (in lots of instances) not be a problem. The correct mounting hardware would be the trick.>> <<@paulblythe5899 says : Fantastic walk-through of what the HQ cam module is like with different lenses and different recording methods. The Cine Pi is a great project and I love the fact it uses 12-bit DNG files for recording. My current wish list for the CIne Pi is some form of focus peaking overlay to help with the manual focus lenses, and support for recording a second camera module (stereoscopic setup) with the hardware sync. 🙂>> <<@x00380x says : Who needs an expensive Blackmagic setup when we have Christopher Barnatt to explain how to do the same on a budget... well done, Christopher. I've just subscribed as you have a wonderful way of getting the message across (love your flowers, by the way!)>> <<@ax-50 says : I had an idea lingering in my head for quite some times now, dashcam out of raspberry pi and car head unit out of raspberry pi. Need to learn something more before I begin these projects>> <<@bryantfloyd7471 says : I have a Nikon D3200 with built-in 24 megapixel DX sensor I paid $700 without a camera lens, $800 for a Nikon 18-300mm DX lens and $200 for a Nikon 70-300mm DX lens. I put it in the closet shelf and left it there when Samsung came out with their smartphone 108 megapixel sensor and 200 megapixel sensor witch is a whole lot better than the D3200 DX 24 megapixel sensor.>> <<@yorgle says : Have you tried macro lenses? I'd like to use one of the HQ cameras to digitize slides. :D>> <<@ChidleyITCompute says : Some of the M12 lenses are really good, much better than the "standard" C/CS lenses sold with the Pi. Fixed f stop though.>> <<@deltacx1059 says : 1:18 overkill much?>> <<@Hobbies4Hire says : Great job on the video! Thanks for making it.>> <<@golfdelta790 says : Chris Another excellent video But I would challenge your closing remark about adding a Nikon 18-200dx? (other lens manufactures do exist, but shall not be named !). You already own that lens so the cost would be only the adapter. You would be demonstrating a re-cycling of a piece of equipment rather than buying new, which you do ( and did in this Video with a second Pi ) to other equipment so what’s the difference. Using that lens on a C/CS adapter will have an issue with the aperture in that, and other similar lenses as you can’t set it manually – on the lens- . so its going to be wide open. Unless you get a adapter than has an independent aperture built in. As an alternative there are many older second hand lenses available from the pre-digital age that can set the aperture manually but you will stuggle toget a focal length less than 20 mm I fear. As well as the aperture issue the crop factor of the sensor will multiply full frame effective focal length. Focusing will be difficult. For an example Jeff Gearing , some time ago, mounted a 70-200mm f2,8 to a High Quality Camera. If you really want to do something really silly, mount a big lens (say 500mm), with the addition of a tele converter just for fun to the High Quality camera... just wondering what the equ focal magnification would be>> <<@jonmahashintina says : kinda all seems more suited to cctv type projects, but could be fun if you had hobby money to burn.>> <<@owenrichards1418 says : Please do a test with the high quality lens. It would be good to see what the results are. Also, some of us might have good lenses lying around from old SLR cameras that could be adapted to run with the Pi. Seeing the results of that would be good and possibly a good, cheap way to score a good lens from old film cameras that otherwise would go to waste.>> <<@RemyRAD says : Hey Chris… I think you'll find. That inexpensive zoom lens you purchased. It is a zoom lens. It is not a, zoomar, Lens. Meaning that? A, TV zoom lens. Keeps the image in focus. Regardless of zoom. But an old-fashioned zoom lens. Does not move the same lens elements, together. Therefore. You must refocus. For every different, zoom position. It's not a lens you can continuously zoom, as you go. It's not capable of doing that. It's a preset, zoom. That's why it was so inexpensive. It's not a TV zoom lens. In that operational characteristic. And those type of zoom lenses, are much more affordable. But really only function. At your preset zoom ratio. But hey for the cost? Such a bargain! And can be used for fixed focal length shots. As it is virtually impossible to zoom and rack focus perfectly, with the zoom. A television zoom lens and other photographic zoom lenses. Hold focus during zooming. It's an old photographer thing to know this. About the different type of zoom lenses that were created over the years. These were the first types. Later came the Varifocal lens for cameras. That would hold focus as you zoom. I just thought you should know that Chris. As part of photographic history. Before we ever had computers. We had silver oxide. Later we got iron oxide we recorded pictures on. Now I think we record little magnetic bubbles? Whatever that means? I'm sorry it really seems like you have to go through, too much stuff. Just have a Raspberry Pie Cam? That's a lot of expensive components to put together for a single, high-res TV camera. Like the tiny 4K video cam recorders. A little less than 2 in.² weighing virtually nothing. Onboard all of those little battery-operated flying drones. And what you need this huge behemoth contraption for? Instead of one of those miniature marvels. That already supply a digital bitstream output. I don't understand you Chris? I thought you were a little more progressive than, this huge camera contraption? Requiring a separate Raspberry Pie, computer on a card. Just to get a video output. Jesus Christ man? Do you got's a fever? HUH? I mean I find your camera set up rather comical. We are already 1/4 of a century, into this one. Optical imaging technologies have virtually been refined to pass, Hollywood quality resolution. Out of something the size, of a cigarette filter. With 4000 lines of resolution. Refresh rates of 60 Progressive frames per second. Direct MP-4 and MP-5, high-res bitstream output. What are you doing with a Raspberry Pie? The new circuit boards are the size of your pinky fingernail. You could accidentally swallow it if you're not careful. There are other medical grade cameras that can do that. So don't try to swallow your raspberry pie camera. You might choke… To death? And then we would miss your haircut. I have been watching you and your channel for years. I love it. But I never realized… You have always been AI. And here we thought you were for real? No wonder you don't have a girlfriend or a boyfriend. You exhibit no emotions. Who do you think you are? Mr. Spock? He wasn't for real! He was played by a cartoon actor. And we know know you are AI. Because you are not aging. You are a computer facsimile. Of a poor dead British computer geek. We know who and what you are! We have Intel. You don't. You have AMD. All Most Digital. That's why it's called AMD. It's fake digital. We have the only real Intel on this. And computer cameras have gotten very tiny and flyweight. Where have you been Chris? I mean the fact that you could make a video camera with a raspberry pie. It is equally amazing. But I am not a computer geek like you. That is no big deal, for you. And you're not trying to get action shots. Requiring zooming while it holds the focus. Such as in sports coverage. Where your $16 zoom lens can't cut it for that. Otherwise? I love your channel. I've been following you for years. But you are not aging. Something is wrong here? Your AI programming doesn't have you aging. Your programming is flawed. Your hair never grows. Your spectacle diopter doesn't change. And so I think you are the most Natural looking and sounding computer simulation ever. We'd love to know what you really look like? But you are likely a dwarf. And you have given us this computer simulation. Of a normal appearing person. With a, Moe Howard, haircut. He was the base of an emitter and collector. And had nothing to do with the IRS. Stateside here. Just so you know. By the way Chris. Did you hear? The Queen, is finally dead. RemyRAD>> <<@chriholt says : Wow, the "CinePi" turned out to be very impressive indeed. I assume you could have done some post production tweaking to make the Pi look much more like the Panasonic?>> <<@kwacker45 says : nvidia jetson nano review coming soon?>> <<@stargalacticfederation says : Sometime when you have a chance can you please build a High-speed Camera 660 FPS using a Raspberry Pi 5.>> <<@thebuckyreal says : Does the rpicam software have the ability to do a White Balance? Could doing that improve the color quality of the output? The color seemed a little bit off, but it also seemed to shift...>> <<@sprint955st says : 1:25 right hand you looks like a NPC version of you in a video game>> <<@CouchPotator says : How much bandwidth does the camera's ribbon cable/chipset have? Can it do Full HD at 60, 120, or more fps? 4K? It's a 12 MP sensor so it could probably do 8K. But at single digit fps?>> <<@MichelMorinMontreal says : So as not to attract lightning, let's make it clear from the outset that - yes - this video camera based on Raspberry Pi hardware does not claim to replace professional equipment, or even equipment for experienced amateur film-makers! That said, being able to build and use this CamPi is another milestone for enthusiastic tinkerers! I imagine that in future iterations, sound will be part of the software/hardware offering... Thanks for the presentation!>> <<@wesss9353 says : I just saw a neat case for the Raspberry Pi 5, it's called Pironman 5, but it looks expensive.>> <<@StuTubed says : I would be very interested to see how larger lenses from Canon/Nikon/Sony etc work with the camera module. I have a few Nikon lenses that I used to use with an old DSLR that doesn't shoot video, and they could potentially get some use as long as the sensor size doesn't cause too much of a problem.>> <<@esmailbadawy2137 says : can you use it on any risk-v board?>> <<@DusterDiesel says : Thanks 👍>> <<@SwedishNiceGuy says : Christopher: Your videos are top-notch. But please take a well-intentioned piece of advice. I took a filmmaking course a few years ago and the teacher said something interesting about acting natural on video (which you do 99 percent of the time). He said: If you say you want a close-up video of someone flipping a light switch, they will automatically do it super-slowly, 10 out of 10 times. You have to tell them to do it normally. I see that you always end sequences by drawing out words and sentences and you always end your videos with extra long pronunciations of words. If you had used the same tempo throughout, your videos would be indistinguishable from professional videos and you would have gotten a 100 percent score from me. Maybe you do it to put your own spin on the videos? Can we try making a video where you follow these tips and see what the audience thinks?>> <<@TooSlowTube says : Is there software to make a Raspberry Pi with a camera module into a USB webcam? Or maybe do motion capture taking a still when something changes and saving it to the micro SD card or an SSD? I looked a while ago but everything I found seemed to need WiFi or an ethernet connection. I'd rather it was either standalone, or connected to a PC by USB.>> <<@duralikiraz says : 👍>> <<@malcolmcheyne3803 says : Thank you Chris. Another brilliant video. BUT (my problem) I'm afraid you are leading me down a 'rabbit warren' with all your wonderful creative ideas. 😉😎>> <<@mianunya7607 says : Is it weird that i like how the pi camera looks more than the expensive camera?>> <<@edwardharding5677 says : As you normally shoot in Apple ProRes when using your HDMI recorders, were you still able to do this when you had the Pi connected to the Video Assist 4K? If you were, what was it like to edit it?>> <<@JediBuddhist says : Always a pleasure. Thank you. <3>> <<@ArnaudZANETTI says : Nice video. Regarding sharpness, not all lenses are built equal, as you clearly demonstrated, but I'd like to emphasis a few points : - F-stop (i.e iris setting) can make a lot of difference in sharpness (as well as depth of field) - integer decimation i.e. one integer number of sensor pixel for one video pixel ; with the 2028x1080 sensor mode, this would require a little cropping through --roi 0.0266,0.1447,0.9468,0.7106 to only select the 1920x1080 center pixels - sensor mode also make a great difference ; from what we can see from the command-line, you are stuck with the 2x2 binning because of limitation on the 2-lane CSI interface (and clock speed) and I suppose your CinePi image also has the same limitation ; yet, with some minor fiddlings (https://forums.raspberrypi.com/viewtopic.php?t=371216, thanks to 6by9) you can get 4K@30fps, at least on the Pi 5. Using the full 4K Bayer matrix as input give you much detailed and sharper images, not matter the lens, even when actually encoding at 1080p ; for a clear example, look at https://raspberrypicad.blogspot.com/2025/03/why-imx477-2x2-sensor-binning-mode-is.html the difference is stunning. I hope CinePi will provide an image that has the support for 4K@30fps on the Pi 5 !>> <<@skogach says : It's interesting to see how actual camera lens is going to work with pi camera. There are plenty of cheap vintage lenses from film era you can attach using adapter.>> <<@stargalacticfederation says : When you have a chance can you please build a High-speed Camera 660 FPS using a Raspberry Pi 5.>> <<@VIVIVI920 says : Did anyone else notice how the colour on the Pi camera would just go really pale every so often, making Christopher look like a zombie?>> <<@1974UTuber says : Forget about explaining computers or flowers Chris. How about explaining the talking Panda,the Elves and the Fairies? 😅 Do we need to start worrying about you?>> <<@dragonfly-7 says : 21:24: This is the famous british humour, isn't it ? ... 🤓 ... All in all another excellent contribution on something which was not on my personal bucket list yet. As always: Well presented ! Thanks a lot !!!>> <<@Jacko_486 says : Where on earth did you find a talking Panda! Great video as always.>> <<@Big-Jock says : This project is amazing. The only problem seems to be with fine adjustment to the focus of the lenses, they don't quite get the sharpness of the Panasonic. Still very good though. Is there an option for upgrading lenses on a more reasonable budget than going full Pro?>> <<@rdqsr says : Out of curiosity re: the small screen issue. Would a Pi be powerful enough to power both the LCD on the CinePI, the camera, and an external monitor (e.g a large one you'd have facing you on set) plugged into a HDMI port?>> <<@strawberriebabieex3 says : very good presentation. and quite fun to see new and exciting ways of using the Raspberry Pi Cinema Camera. thnank you for explaining all the nuances required to get the best results. and thnak you for posting! (enjoyed seeing your garden as well.)>> <<@alsadekalkhayer7007 says : I'm curious as how much the whole setup would cost. It would cost at least the double where I live😢>> <<@laser-sj says : I REALLY wish this could output NDI !>> <<@jimhowat7261 says : First test: Pi seems to be running at circa. 30Hz, (from terminal window) was the recorder at 25Hz as shown later? Some bad motion artefacts on display. Not an ideal comparison if so.>> <<@theodorstravels says : Next project add measuring lasers and small electric motors for autofocus.>> <<@PeterFamiko-lw8ue says : At last somebody did this>> <<@g0ral says : If something looks stupid but it works it's not stupid. But it doesnt work...>>