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Robert Houllahan

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Everything posted by Robert Houllahan

  1. We have lots and lots of 16mm in the lab getting souped and I think it is just a case of high demand outstripping supply for now. Hopefully Kodak can catch up I have been hearing that 7219 is about two weeks out from customers talking to Kodak. B&H had some but I think they sold out quickly when they reopened after the holiday.
  2. Depending on the scanner they might have just left a software switch flipped, so it would not matter Pix quality wise, this is possible on a machine like the Scan Station or Xena that has a "flip horizontal" button in the setup. A DFT Spirit 4K Arriscan or other machine that uses mechanical sprockets or pins cannot really be loaded backwards like a Scan Station could be so again if ithe pix is flipped it was a software choice. So IMO if you flip it back in edit it should be fine just check that you are seeing grain finely scanned to be sure.
  3. Yes LaserGrpahics had an extensive line of CRT based film recorders for both still work and motion picture, it was only a few years ago that they stopped making some really high end motion picture recorders and concentrated on building scanners.
  4. I know Kodak had stated it was as high as 16 stops at one point and I think it sort of depends on stops over grey vs. under and you can overexpose negative quite a bit and still get something from those hilites, but that does present a challenge to digital scanning as the hilites in a negative tend to intersect with the shadows in a digital sensor and that is where digital sensors tend to have the most noise. One of the nice things about the Spirit 4K is that is has a very bright 800W Xenon lamp (which has an elaborate system to remove the heat) and a valve on it so you can really put allot more light through the film than most LED lamp sources on newer scanners. I have had work in that was intentionally overexposed 5+ stops for the look and been able to get some really nice and unique looking scans from that on the Spirit.
  5. I paid about $9K for the 6.5K camera and a CoaXpress frame grabber. the 5.3K Pregius is the same pixel as the 6.5K and the 4K ones in that line so results should be similar but fewer pixels. I thought the ArriXT was more and I see there is a "reasonable" price for an update to the original machine, it is a great scanner and a true RGB scan with the excellent ALEV sensor. A two flash HDR on a 12-bit sensor based scanner gets 14bit precision not 16bit but some of the latest Pregius and Starion Sony sensors are 16bit A to D now and likely have good noise so realistic 16bits being obtained, the 14K rolling shutter Sony is 16bits for example.
  6. In spooling down 400ft rolls to 100ft rolls the typical procedure is to wind the roll down from the head onto the second rewind then spool it back onto 100ft daylight spools so the 1R is correct, so it would be EI and this is done with the film wound from top to top of the rewinds. Winding from head to tail and then back would not be necessary for 2R film but would be the standard procedure. To wind the film EO you would have to wind the film from top of one rewind to bottom of the next to get the emulsion to face out on the reel, a big difference from winding from the top of one rewind to the top of the other. When using old stock like this you really have to check the film and make sure the original roll and the spooled down daylight spools are showing emulsion in before shooting.
  7. I always do an overscan for registration tests and on the Scan Station or Xena which have machine vision optical perf registration so the scan will be rock solid locked to the perfs. Best practice IMO.
  8. There are many ingredients to a process and one tank may be exhausted i.e. bleach fix which needs to be de-silvered and the developer is fine. It is very rare that a whole machine's full chemistry will be all dumped and replaced at once. We run a sensiometric control before each run and check it on the densitometer and adjust chemistry as needed to get it into the proper spec to run. Also there is a metered replenishment fed into the various chemistry tanks to keep it at spec for the run. In theory and in practice a sensiometric control strip run at the beginning of the run and one at the end will be practically the same numbers on the densitometer and day to day.
  9. The Spirit 2K/4K has a spring loaded rail and a ceramic guide for the side closest to the film deck. Registration is fairly good for a telecine and also depends on what features are enabled on the machine. It is not a mechanical or machine vision registered system and without one of those features in 2021 a scanner is relegated to being a dailies machine which will require allot of un-required work in post.
  10. I would not exactly call it an AI but it has a certain area that it expects the perforations to be in and then looks for a specific shape and the contrast of it. If you want to do really well stabilized film scanning without machine vision perf stabilization you will need a far better mechanical film transport than the ones on any of these new scanners. You can trigger the lamp/camera with a number of perf detector technologies from capacitive, laser or the optical encoder on the capstan.
  11. A ScanStation can scan at 30fps or 15fps in HDR mode, the Arriscan in HDR is about 1fps. maybe slower, I am not sure about the speed on the new Arriscan XT but it does have a full immersion liquid gate option.
  12. The Scan Station has to be able to see the perforations with the imaging sensor to register the perfs and stabilize the film, there is no external sensor or mechanism. The transport is driven by a servo controlled capstan which has a optical encoder wheel attached to it, the film is driven at constant speed and then the machine vision perf stabilization does the rest.
  13. A number of currently available scanners do and with the newest sensors, it is just a hit in speed and there is high demand for quick turnaround times on film scanning. The theory is that with enough pixels a CFA Sensor can make the equivalent of a real RGB sequential scan and I think that is somewhat true especially with 2X and 3X resolution oversampling. The issue is the CFA lenses are imperfect and there is allot of cross-talk between color channels compared to a sequential RGB scan so that crosstalk is worked out with math in the scanner software. All that said there are customers we have that prefer the scans coming out of the new 6.5K sensor based Xena scanner we run to scans from the Spirit 4K or Scannity which are true RGB.
  14. I have a DFT Spirit 4K and the new 6.5K sensor based Xena I have has better performance in terms of detail noise performance and steadiness. We have client who prefer the scans from the 6.5K Xena to Scannity scans for OCN. The SDC2000 Spirit is a very old and superceded telecine which does not even scan at 2K.
  15. Looks like a optical sound reproducer for reading soundtracks from prints. Not sure the make.
  16. Rank-Cintel had absolutely nothing to do with the Thompson DFT Spirit, in fact Cintel and Thompson were competetors in the Telecine marketplace. Cintel (then Rank bought them so it became Rank-Cintel) introduced the first really high quality Telecine in the 1970's and that is what this chassis is here, a MK3 Cintel Telecine. Cintel used a system called "Flying Spot" that used a CRT to make the light for the scan, the Thompson Telecine used three linear CCDs and a hot lamp for the light source. Cintel had several 4K scanners based on the Flying Spot tech at the end of their run, then BlackMagic Design bought Cintel. The mechanical film deck and chassis on Cintel Telecine systems is second to none and is essentially a great platform for refitting as a modern scanner.
  17. Having been through this for years the GPU is generally where everyone has landed for machine vision based registration, the Xena allows you to select GPU or CPU and CPU is a significantly slower method that kills scan speed, and that is why LG does it in CUDA. I think it is the only way to get that job done at the speeds they can achieve with scan station, I don't think the frame grabber has the processing capability to do this in a fgpa there is just not enough processing at least for fast scanning. As for the Northlaaaggg it is a line array and they drag the stage along for scanning the image, a not perfect mechanical arrangement, the Arriscan is an Area Scan sensor so the film and camera are held still for capture. Plus German fussiness.
  18. Here is the "latest /greatest" sensor that companies are using in film scanners: https://www.sony-semicon.co.jp/products/common/pdf/IMX342LLA_LQA_Flyer.pdf 6.5K 12-bit Global Shutter. A machine vision camera and high speed frame grabber with this sensor will run about $7.5k-$8K You cannot use a rolling shutter sensor for continuous motion film scanners like Xena ScanStation etc. it has to be Global. For intermittent scanning (Step Frame-scan-StepFrame etc.) you can use a rolling shutter. Here is a 14K sensor: https://www.sony-semicon.co.jp/products/common/pdf/IMX411ALR_AQR_Flyer.pdf Figure $16-20kK for that camera.
  19. Real-Time perf stabilization is done in GPU on all of these non mechanically pin registered machines. BT at Co3 told me that they had done reg tests on the Scannity, the Scan Station the Spirit 4K and the Arriscan and that the Arri was the best registration of all of the systems they tested. I was told that LG does all of this in CUDA language on the GPUs thus the speed, on our SSP the Scanner app is actually a 32bit one. Xena uses OpenGL and Quadro GPUs so same result just slower than the LG machines which are sold as the fastest as a main sales point. Most of the computer and imaging parts are off the shelf for these new machines with some customer hardware and then mostly software to glue the pieces together and make them all work.
  20. The Xena works like the LG machine(s) for a color sensor it is 2-flash for a mono sensor it is 7 flash, so 2-flash per color plus IR.
  21. We see people shooting print stock for the look and cost, it has a unique look and color. I would suggest running it in a Filmo or a similar robust camera in case of a jam.
  22. Also the "HDR" works by rewinding the film and doing a second pass and not by double flash while scanning like the Scan Station. It is what it is. Pretty poor for 16mm. Effective Resolutions 3840 x 2880 - Super 35 3390 x 2864 - Standard 35 3390 x 2465 - Anamorphic 35 1903 x 1143 - Super 16 1581 x 1154 - Standard 16
  23. I was able to get my Data Spirit migrated to SUSE11 and PhantomII software which is much more modern.
  24. Also while looking at these machines I think it is good to remember that it was not that long ago that none of this fancy digital high res sensor and fast gpu stuff existed. Realtime 2K and 7-8fps 4K true RGB was pretty impressive when these were new in 2005ish on. And post houses and labs which bought these scanners typically made that investment back in a year.
  25. Spirit Data (2K 4K) machines are complex to setup, most run BONES on SUSE10 Linux and require very specific FC storage. Spirit machines with the SDI video outs can be run standalone with the GCP controller or connected to a DaVinci 2K. Spirit 2K 4K are usually 3-Phase power although they can be configured to run on 220v. Not really machines for the uninitiated or those who think they are going to be an easy machine to run.
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