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DPChallenge Forums >> General Discussion >> how do cinema camera's do it ?
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09/05/2006 08:10:33 AM · #1
im kinda wondering how do cinema camera's adjust exposure, do post editing ??? ... how do they achieve that level of control over rolls of film ? ...
09/05/2006 08:34:36 AM · #2
That's whey they have a director of photography. Must be an interesting, but challenging, job.
My light meter has a cine mode for measuring such things - FPS is set and then it reads aperture.
09/05/2006 08:37:32 AM · #3
how do they do post processing ?
09/05/2006 08:38:51 AM · #4
Nowadays the postprocessing is done digitally, using "AVID" mainly in the industry I tihnk.
09/05/2006 08:43:00 AM · #5
whats AVID ?
09/05/2006 08:46:24 AM · #6
AVID
09/05/2006 08:46:39 AM · #7
Its an editing system for Movies :)
09/05/2006 09:00:26 AM · #8
Exposure depends on the flavor of film, and the speed of the film. IE, tungsten or daylight balanced, 100, 200,400 ASA and so on.

Exposure in FPS is a factor as well. If the frame rate is slow, more light goes into the lens. If the frame rate is fast, less light goes through the lens.

The companies that make film is a determining factor as well. Each company has it's own way of determining the speed of film. What Kodack says is a 200 ASA, may be actually better rated at 250 ASA.

Kodack, Fugi, and Agfa rate their films differant from each other leading to tests before any production is started.

DPs are the judge and jury on exposure, and they make sure all is good during the test using everything they know to find out what the film they have chosen to work with will do.
09/05/2006 09:27:25 AM · #9
american : and how do you do post processing on film ?
09/05/2006 10:53:58 AM · #10
And then Director's can muck it up even further by tossing in a few wrenches.

I believe it was "Three Kings" (The Gulf War based movie) in which the director chose to shoot several segments using 35mm color film instead.

That said, did anyone but me think they TOTALLY blew the production in Pirates of the Carribbean in a few scenes. I remember a few scenes of the characters against a blown white screen. I was like "What...with the budget they had they couldn't have post-edited the sky to a blue color." It just suprise me by it's crappiness in an otherwise spectacular set and shoot.

- Saj
09/05/2006 11:55:28 AM · #11
Originally posted by rami:

american : and how do you do post processing on film ?


The avid was correct for most films. It is a special machine built for editing movies. It has a few screens and a special keyboard. Watch the behind the scenes on a few DVDs and you will get a good idea.
09/05/2006 11:59:42 AM · #12
Originally posted by American_Horse:

Exposure depends on the flavor of film, and the speed of the film. IE, tungsten or daylight balanced, 100, 200,400 ASA and so on.

Do you know how they execute the technique of "Day for Night"? I knew once when I saw the Truffaut film in a class, but I've since forgotten how it's done. I have a photo to which I'd like to try applying the effect.
09/05/2006 12:06:34 PM · #13
Originally posted by GeneralE:

Originally posted by American_Horse:

Exposure depends on the flavor of film, and the speed of the film. IE, tungsten or daylight balanced, 100, 200,400 ASA and so on.

Do you know how they execute the technique of "Day for Night"? I knew once when I saw the Truffaut film in a class, but I've since forgotten how it's done. I have a photo to which I'd like to try applying the effect.


Are you talking about the B/W technique of using a very deep red filter to make daylight shots appear to be taken at night, due to the darkening effect on the sky and foliage?
09/05/2006 12:07:55 PM · #14
Originally posted by jemison:

Are you talking about the B/W technique of using a very deep red filter to make daylight shots appear to be taken at night, due to the darkening effect on the sky and foliage?

That sounds like it could be it : )
09/05/2006 12:38:07 PM · #15
For my post processing my mini-dv format I use Adobe Production Bundle 2.0 which includes, Premiere Pro, After Affects, and software for Dvd menu/authoring/creation. Boris F/X Red/Graffiti is also highly acclaimed. They offer a lot of professional control over most everything, although there may be a learning curve for the beginner.
09/05/2006 12:47:00 PM · #16
GeneralE : share with us

what you are refering to is digital post processing ...
but to my understanding they shoot movies on FILM ...
do they convert them to digital and work with them ??? or is thre way to actually edit them on film... of course it would make sense to convert on digital but what kinda resolution do they convert to to preserve quality when later on projected on a huge cinema screen...
09/05/2006 01:10:21 PM · #17
Originally posted by rami:

GeneralE : share with us

what you are refering to is digital post processing ...
but to my understanding they shoot movies on FILM ...
do they convert them to digital and work with them ??? or is thre way to actually edit them on film... of course it would make sense to convert on digital but what kinda resolution do they convert to to preserve quality when later on projected on a huge cinema screen...


they convert to digital then print to film. you can edit a film the old way by cliping and taping but why? and some shows and films have started shooting digtal as well. if you want to know more about film making pick up a few books. if you want to know about making independent films try rebel without a crew it is a fun read.
09/05/2006 08:41:43 PM · #18
Originally posted by rami:

american : and how do you do post processing on film ?


I am a production, and a rigging type crew member for set lighting. The Avid sound about right, but I thought it was an application and not a machine.

Originally posted by GeneralE:

Do you know how they execute the technique of "Day for Night"? I knew once when I saw the Truffaut film in a class, but I've since forgotten how it's done. I have a photo to which I'd like to try applying the effect.


Yeah, it's a simple thing. The grips were tenting in a house today as a matter of fact for a day for night scene for tommorrows work.

Basically, you either blacken windows with douvatein, or tent windows with douvatein so lamps can be rigged inside for a tungsten look, usually.

Night for day is the opposite, but using HMI (daylight balanced) lights.

Originally posted by jemison:

Are you talking about the B/W technique of using a very deep red filter to make daylight shots appear to be taken at night, due to the darkening effect on the sky and foliage?


NO. That is a total differant look, and technique.

Originally posted by Elvis_L:

Originally posted by rami:

GeneralE : share with us

what you are refering to is digital post processing ...
but to my understanding they shoot movies on FILM ...
do they convert them to digital and work with them ??? or is thre way to actually edit them on film... of course it would make sense to convert on digital but what kinda resolution do they convert to to preserve quality when later on projected on a huge cinema screen...


they convert to digital then print to film. you can edit a film the old way by cliping and taping but why? and some shows and films have started shooting digtal as well. if you want to know more about film making pick up a few books. if you want to know about making independent films try rebel without a crew it is a fun read.


In todays budjet oriented productions, yes, film usually is off-line edited to a digital tape, or HD.

But, there are still some die hards out there that prefer to old school the editing process with film. That is, put it on a reel, cut the print by hand, and edit on a standard 35 mm, or 16 mm editing bay.

The show that I am on is total HD, and basically eliminates the loader in the camera department, and creates the HD tech instead. Or yeah, the lab is out of a job, and production saves around $20K per week in lab fees.
09/05/2006 08:59:00 PM · #19
Originally posted by American_Horse:

The Avid sound about right, but I thought it was an application and not a machine.


It is an application or a suite of applications if you will, but does use a dedicated machine because of the many monitors and special keyboard. Not to mention all the other equipment. Watching someone skilled at using it is very cool.

Thanks for all the info American horse.
09/05/2006 09:07:27 PM · #20
Originally posted by Elvis_L:

Originally posted by American_Horse:

The Avid sound about right, but I thought it was an application and not a machine.


It is an application or a suite of applications if you will, but does use a dedicated machine because of the many monitors and special keyboard. Not to mention all the other equipment. Watching someone skilled at using it is very cool.

Thanks for all the info American horse.


there ya go, I just learned something today.

Thank you Elvis (da'King) L.
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