Fro Film Project Episode #003 - How does the camera know what ISO
Have you ever wondered how do film cameras know what ISO film you are using? In the day and age where you can change your ISO automatically or on every shot I take a look back at how a SLR registered the Films ISO.
If you take a look at a film canister there is a metal bar code called the DX code. Each code represents a different film speed. The camera then reads the code to set the ISO of the film.
This is an important step as if you set the wrong ISO in the camera you may not be happy with the results. The ISO tells the light meter where it needs to be so that you can get the proper exposures. If it is set wrong your images could be over or under exposed.
I hope you continue to enjoy the FroFilmProject Episodes.
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- I Found Them Under My Bed: FroFilmProject My Negatives
- My first real photos: Critique from 1994
- Mystery Critique: These Photos Suck, oh yea, they are mine
- How to turn a DSLR into a $4,000 Peephole
- FroFilmProjct Yes there was such a thing as FILTERS in the Darkroom
- Fro Film Project All 36 Shots From A Roll of 3200 Speed Film