I have some knowledge about analog cameras, but I need some technical details:
- How does the camera detects the ISO of the film?
- How does the camera moves the film?
- How does the camera knows that it reached the end of the film?
I would apreciate if you give bibliography. :D Thanks!!
Best answer:
Answer by Y U SO STUPID
http://en.wikipedia.org/wiki/Photographic_film
Add your own answer in the comments!
Normally, stuff like that is covered in textbooks and lecture notes.
ReplyDelete1) By the photographer selecting the correct ISO on the camera or DX coding
2) gears
3) magic
Or you could do a google search
- How does the camera detects the ISO of the film?
ReplyDeleteHave you seen the metal pieces on the outside of 35mm and APS cartridges? That is called DX encoding, and it tells the camera what ISO the film is.
- How does the camera moves the film?
There is an uptake spindle in the camera. It is either moved mechanically by the user, or with a motor in the camera.
- How does the camera knows that it reached the end of the film?
The film is taped inside the cartridge. When the camera (or user) feels resistance, it (or he/she) knows the film is finished.
research it
ReplyDeletebut for later film slr's it's a dx coding, but it can be adjusted manually. On manual cameras you set it yourself.
Gears.
buy the length of the film.
1: Depends on the format and the camera. Medium and large format cameras as well as older 35mm cameras have to be set manually by adjusting the ISO/ASA switch. Modern 35mm and APS (usually point and shoot compacts, rather than SLR systems) will use DX encoding. The camera reads the code embeded in the side of the canister and sets it's meter accordingly.
ReplyDelete2: Again, depends on the camera. Some will have an auto winder, other will have a manual crank. Either way, if you look inside the camera you'll see a take up spool and a spool with teeth on it. The take up up spool winds the film around it while the spool with the teeth feeds it on to the take up spool. Gears inside the camera make sure it all happens smoothly. A medium format camera is different, the film comes on two spools rather than in a can. You wind the film from one spool to the next manually using the crank. Large format cameras don't wind film as they use sheet film rather than roll film. You advance to the next frame by replacing the dark slide back into the film holder to cover the exposed film, you then remove the holder and replace it with another one already loaded with a fresh sheet of film, remove the dark slide and trigger the shutter to take your photo.
3: Depends on the Camera. A DX encoded 35mm or APS camera know how many frames are on a roll of film from the information embedded in the code. It counts the number of frames it shoots and then stops, it either rewinds automatically or you do it, either way once it reaches that number of frames it wont shoot any more. A non DX encoded 35mm camera is slightly different. With these you normally manually advance the film using the crank, you know when you've reached the end as it wont crank any more. When it no longer advances you use the rewind crank to rewind the film back into the cartridge. A medium format camera is different as you roll from one spool to the next, at the end you just take out the whole thing. Medium format film has backing paper that prevents the film from being exposed to light when it's rolled up on a spool. You have to hold it tight though as the buggers have a tendency to spring open.
Question: "How does film works in an analog photographic camera?"
ReplyDeleteAnswer: I believe you mean "FILM photographic camera"
Q: "How does the camera detects the ISO of the film?"
A: It doesn't (necessarily). Some cameras can detect the iso by automatically reading silver part of the film canister. For others, you have to manually set the iso.
Q: "How does the camera moves the film"
A: by the film advance spool. It can either do it automatically or it needs to be done manually by you.
Q: "How does the camera knows that it reached the end of the film?"
A: It doesn't (necessarily). Some cameras can automatically detect when the end of the film is reached (because the film will no longer advance). For others, you know when you've reached the end because the lever you need to pull will no longer move.
If you want a bibliography, do your own work.