More info ala Koo's site- http://nofilmschool.com/2012/02/latest-chinese-kineraw-digital-cinema-camera/
Sounds interesting for the price tag. One item that bugs me is the cmos sensor. Someone needs to move past it at some point. The thing that really puzzles me is the super 8 version. WTF? Can someone 'splain?
WOW! People who dream of recording a cameras RAW Data (Video) should first read all the commends from Dan Hudgins on vimeo.
after that they might appreciate what a little camera like the GH2 does before a usable image can be seen. Sorry GH2 for complaining about your banding :-)Example:
Dan Hudgins 4 weeks ago
Hi Ted,
As I mentioned in the comments for the #A1 lens test reel, you cannot look at the RAW footage without grading and seem much as it looks like this:
1) Out of focus because there has not been anti-OLPF compensation applied.
2) Very dark almost black at the higher ISO because the camera records sensor linear data, most of the information is in the lower percent of the signal, with two stops of head room, 18% Gray is at about 5% signal depending on the black offset.
3) Almost no color at all, because the Bayer filter in Bayer sensors is de-saturated to allow higher ISO and luma detail in all pixels, the color needs to be increased through a chroma matrix tailored to the sensor type, light source, and subject matter.
4) EI/ISO adjustment curve is absent so the image brightness would vary from one shot to another. Part of the de-Bayer process is to softclip the highlight information to fit within the range of an 8 bit display. The camera shoots 12bits linear data which cannot be displayed on a computer monitor with the slope angle at the same angle as when shooting, to squeeze the tones into a viewable range the RAW data needs to be run through a LUT to correct for the EI/ISO used at the time the images were shot.
5) White balance, the RAW data has a green bias and not white balance, its True RAW data, so no mater what color light you shoot under the sensor is recorded in the same way, so the data levels vary depending on the K value of the light.
I have a workprint mode in my de-Bayer program that can output as fast as possable workprint quality without color correction or white balance and EI/ISO curve, but its of limited use at low EI/ISO and almost useless for high EI/ISO as the images would be too dark to see well unless you turn all the grading room lights off and turn the monitor brightness up.
I do have color corrected workprint mode also, for fast conversion, I running the anamorphic footage I have shot with date+TOD and SMPTE time code burn in so that my Brother can edit it on his computer using a windows program and then I can set the head and tail edit points from the time code in the edited version since its on the screen as a burn-in from the camera's meta-data in tag 50740 of the DNG frames. My software can also burn-in the slate information from the camera's built in auto-slate that has a beep and marks the DNG meta-data for the head and tail beep frames, that way I can read off the scene and take numbers off the first frame from the auto-slate to find the source shot folder as needed.
I've been grading the shots hard because Kinefinity (tm) said that they wanted the images with more contrast, I had been trying to show the long tonal scale of the camera but doing that tends to make the images look a bit flat and un release print looking.
Movie film is shot negative and printed this way:
1) Camera negative
2) Master positive
3) Duplicate negative
4) Release print
That results in the tones being up-side-down half the time and that affects the way resolution, gain, and saturation vary in the shoulder and tone of the release prints transfer curves. There are also dye bleed and S-curve effects.
My de-Bayer program has processing steps to get away from the HD look and simulate some of the more 35mm negative-positive-negative-positive look of a release print.
Its possible to process the RAW data to get a bad camcorder look, but if you want that you don't need to get a Digital Cinema Camera you can get a camcorder.
Thank you for the complements. I'll try to make some less hard grades on some other sample reels when I have time, and I'm also looking forward to shooting True RAW for monochrome to get Black and White film stock simulation, as I have control over the matrix, its not set to NTSC or PAL like in a camcorder, I can simulate Ortho, Pan or Super-Pan film stocks to get the 1910's, 1920's or 1930's film looks, maybe.
Each camera's sensor has its own unique look, in part because the dyes used in the Bayer filter are proprietary for each chip maker.
If you want to see what True RAW data looks like, you can download the DNG frames from the Acam dII (tm) web site, and the use the free program DNG_validate.exe (tm) that comes in a ZIP file on Adobe (tm)'s web site to convert the DNG to TIF that you can open in some graphics viewer like XNVIEW. DNG_validate.exe (tm) is a free program made available by Adobe (tm) for developers to check the header on True RAW DNG files the make for compliance with the open CinemaDNG standard for True RAW Digital Cinema Cameras. Unless they have changed it, you should see a very dark, greenish, soft focus result.
I should add that True RAW data has constant grain noise that is more film-like grain than the mosquito noise caused by H.264 compression in 8bit HDSLR recording. In those compressed cameras de-Noise is burned into the recorded images, but in a True RAW CinemaDNG camera the de-noise is done in post production so you have control over how much grain noise you get, and its new grain on each frame, just like film grain, and unlike key-frame compression such as MPEG2 for DVD where grain can stand still for 4 frames of so giving an un-film like result of gain that pulses rather than being like constant raindrops.
I used the temporal noise reduction built into my free de-bayer program, DANCINEC.EXE (tm), to prep the frames before compression for upload here to minimize the build up of MPEG4v2 (H.264) related mosquito noise and block artifacts and to minimize the kbps required to get the images encoded so more bandwidth would go to detail rather than noise.
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