Krstic Zoran

RGB stripped sensor in F35 and SRW-9000PL has twice the vertical resolution and three times the horizontal resolution of a normal 1920x1080 HD raster.Three times the horizontal resoluotion of HD is logical.With this approach Sony made advantage in comparison with Bayer pattern used by RED,ARRI,... because RGB stripped sensor avoid interpolation to make full color picture. But, what is purpose of twice the vertical resolution (2x1080 px = 2160 px)? Here I found that:"...It was one normal row of photosites filtered for each color and one row ND'd to capture bright information per color". http://www.cinematography.com/index.php?showtopic=28026 Very logical answer,but is it truth!? Today at presentation of Sony SRW-9000PL I asked about that and presenter told me oppositely explanation... He said that no one ND was used over half of CCD's array.His theory is based on Gain function..."...It was one normal row of photosites filtered for each color and one row is amplified to capture information at low light (per color)". Amplification is made by Gain of +3dB...half array is read by 0 dB gain...second half is read by gain value of +3dB. New theory sounds like a ALEXA readout mechanism... There are two opposite explanations...what is the real story behind Sony's stripped CCD!?

How many bites was made if all of data from CCD is digitalized first...of course before MPEG4 compression in case of F23 or F35!? 3 x 74.25 MHz x 14 bits = 3118.5 Mbps /4:4:4 or 3 x (1920 x 1080) x 14 bits = 87.0912 Mb x 25 fps => 2177 Mbps I think that first equation is right...but in book "High definition cinematography" Paul Wheeler (second edition) was explained second equation (for HDW-F900,but same story... :) ). My second question... RED ONE has CMOS sensor at 4096 x 2304/12 bits. Uncompressed RAW => 4096 x 2304 x 12 bits = 113.24 Mb x 25 fps = 2831.15 Mbps How much bytes would be made for RGB 4K (uncomressed)? There : http://www.redoneafrica.com/redone.htm, was written that RGB 4K uncompressed made 1313 MB/s, how? Sorry for too much maths ;)

There are many discussions about resolution for DI process.I understand that necessary resolution limit for 35 mm scan is 4K to keep all of detail or 6K for avoiding aliasing.OK.In case of digital projection more pixels of resolution is necessary for larger screens and theaters to see benefit in regard of 35mm film projection. But...What happen with resolution if 4K or 6K scan (or RED RAW 4K) would be transfered to 35 mm with ARRILASER?Is it limited on 4K as camara negative?Or it would be some resolution as a release print in IP/IN process, less than 2K?

I was reading about MTF response and CCD's resolving power.But after all, I did not make some precise conclusion about it. Story begins: Lenses have response limit at 200 lp/mm.Ok.Every lens have itself MTF response.Example:at 10lp/mm MTF response is ~90%,at 100 lp/mm is ~70%,etc.We saw that MTF response is falling down for higher spatial frequencies. CCD has limited spatial resolution at some value.For 2/3 inch CCD, 100 lp/mm is limiting value.Now if we include consideration about lens and CCD, conclusion is that all spatial frequencies above 100 lp/mm could not be resolved.And if lens have MTF response ~70% at 100lp/mm it means that MTF response above 100 lp/mm is cutted. But,what happened with 35 mm CCD in Sony F35? Resolution of it is same, 1920 px (5760px, but three for every primary;1920 effective pixels), but CCD's width is 24 mm and spatial resolution is limited at 40 lp/mm. It is same story, MTF response above 40 lp/mm is cutted. If my consideration is right, resolving power of 2/3 inch CCD is better than with 35mm in F35.What it exactly mean?Does F23 give picture with better sharpness (measurable resolution) than F35?

Last few days I tried to find an answer about DigiPrime's MTF.I understood that for HD video most important area is around 56 cy/mm and DigiPrimes have MTF 90% at 56 cy/mm.How MTF looks at 200 cy/mm for DigiPrimes?Is it same like a UltraPrime's MTF,which have 5-10% at 200 cy/mm. I found on www.cinematography.net this sentence :"A high definition 24P CCD sensor is 1920 pixels or 960 line pairs, the limiting resolution of the sensor is 100 Lp/mm". Is it means that all spatial frequencies above 100 cy/mm (Lp/mm) are not "captured" with CCD? What happen with resulting MTF,when we have 2/3" F900+Pro35+35mm lens?Is it less than 100 cy/mm? In the case of RED ONE camera,we have CMOS with 4520 X 2540 pixels.If we look last quote,we have calculation: 4520 pixels or 2260 line pairs, limiting resolution is less than 100 Lp/mm!?What is resluting MTF for RED ONE with 35mm lenses?Is it limited on less than 100 cy/mm? Thank you in advance!!!

I found many explanations about progressive-scan CCDs but I'm not sure what is truth. I don't undarstand readout mechanism of progressive-scan CCDs (in HDW-F900,Varicam,etc.) when we work at 24 PsF or either progressive-scan mode (24 p,50 p...).How long is exposure time at 24 PsF,25 p or 50p?Does it 1/24s or 1/48s,1/25s or 1/50s respectively?Is the shutter used in 24 PsF,etc? When we shot at 24 PsF,all 1080 lines are read from CCD at same time!? HDW-F900 record at 24 PsF.How it record 24 frames on the tape?Is the frames divided on odd and even fields or 1st field contents 1st half of 1080 lines? How Varicam record 24 p on the tape?Does it record real frames on tha tape? Does 50p mean that we have real 50 frames read from CCD at second? Sorry,my post is too much confused but I hope that you will understand what is on my mind. Thank you in advance.