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Ivan Ciarlantini

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  1. Thank you for your contribution! Evwn though it is cyrillic i have a russian friend, i will try to translate it. Thank you so much!
  2. Tyler, anything related to camera movements and magazines, magazine ancillaries of "modern" motion picture film cameras. Let's say from the Arriflex 35 III until now passing for the arri line, moviecams, panavisions, aaton if you have any. If you also have material on 65mm film gauge movements and systems it would be appreciated, since i could only find a good amount of data in the American Cinematographer Manual (i managed to find the 7th edition). Plus anything showing the above mentioned drive train responsible for moving the movement and the shutter as well (pretty like the link Mark Dunn suggested regarding the 2C, which explained me a lot). Very nice drawings! Those are what i need, exploded views and cross sections. I found something in FreePatentsOnline typing "Panavision" in the search bar, and i have to say panavision registered a good and interesting amount of patents throughout the years.
  3. Michael may i suggest to you to use an online image uploader (e.g. Imageshack) or, if you have lots of data and pictures like Mr. Tyler Purcell, a dropbox (or any sort of temporary cloud service) would be more indicated.
  4. Yes Tyler, i am desperately looking for pictures and videos, if you could be so kind to share them ^_^ Technical drawings are more than welcome, although i cannot find them, do i have to suppose they are not released at all?
  5. Yes mike, it would be really appreciated if you could post (for public knowledge) or send me via Private Message that drawing (or all sorts of drawings you have related to these Cameras). I would be really grateful ;)
  6. Thank you mark for answering! Your answer is really interesting, i think you could imagine why i was so confused regarding this point. I couldn't understand why the feed reel should be driven, for which reason. Turns out it is not driven. :rolleyes: I'm starting to understand, really. I have to thank both of you guys. Interesting the link between camera movement and shutter, i thought they were driven by two different motors (which, if i think about it, makes no sense). Thanks Again! P.S. I needed to edit this post in order to thank you one more time for quoting the 2C teardown. I just checked the blog and it is really well explained, plus i could see the drive chain in detail.
  7. Thank you so much for the magnificent explanation! I understand now why we need the loops in the camera and i actually never thought that inside the camera occurs a combination of constant and intermittent motion (all this is extremely fascinating). That explains why some camera systems require a certain LOOP LENGTH when changing mag, you need that length in order to allow to the film itself to form those two essential loops. I could already understand the use of the Feed and Take Up sprockets, which are as we said, responsible for the constant motion of the film. Regarding the motors: I suppose you have two main motors (temporarily excluding the magazine motors), i'm talking about the shutter motor and the movement motor. Am i right? Does the movement motor drive the claws and the feed/take up sprockets at the same time? How are claws (and the related motor) synchronized with the mirror shutter (and related motor)? Basically, do both motors constantly run and the synchronization is just correctly positioning the shutter when running the camera (and there you will be sure that the claws will move the film only when the shutter closes the gate). Am i misunderstanding something? Another question regarding the mag: I can understand having an electric motor driving the take up reel since u need a calibrated winding speed and that requires a DC motor coupled with the reel by mean of a friction coupling (it would be really appreciated if any of you could link or post any source regarding this kind of frictions or clutches). Should i guess the motor in the feed reel is just for.. feeding film? The friction will just immediately stop the reel if the operator stops the camera (i was thinking that if you stop the camera when the feed reel is still full, the moment of inertia given from the reel weight could keep the reel turning). Last: No books or sources to suggest? Thank you for your time and patience :)
  8. Good morning Gents as already mentioned before, i am not involved in the cinema industry and i would like to gather some technical info on Motion Picture Film Cameras. First thing first: are there books or documents related to this topic? I managed to find a couple of patents on Free Patents Online, you can guess the basic cinematic chain of a camera movement but it is not as detailed and explaining. For other sources, i didn't know which books to look for. Regarding the first technical on of the features i am curious about: -The basic cinematic chain of a modern motion picture film camera It concerns the transport of the film through the camera itself. I understand that it has to be a balanced mechanism in which all the Sprockets, The movement and the Magazine Spools contribute to the successful operation. In which way though? Which one of these components is primarily responsible for the film movement? Is it the movement itself? Or the sprockets? About the film magazines, i know arri and panavision installed electronics controlled motors in the magazines, in order to control film tension. How will they behave during operation? How was this achieved before installing those controls on the camera mag? I think it is enough for now, i have plenty questions i will keep for later. Thank you. P.S.: No info or picture could be found regarding 70mm cameras (movements, ecc.), i am currently relying only on the user manuals, which are really really interesting (Arriflex 235, 435, 765
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