How does ISO speeds work? I know why its used, but now how it worksEXIF data available. Clickhereto show/hide.Camera-Specific Properties:Camera SoftwareAdobe Photoshop 7.0Image-Specific Properties:Image OrientationTop, Left-HandHorizontal Resolution72 dpiVertical Resolution72 dpiImage Created2007:11:01 19:45:53Color Space InformationUncalibratedImage Width477Image Height300
Some film changes its color at the faintest exposure to light, some other film doesn't change unless it's brightly lit for a prolonged period of time. This sensitivity of film is rated in standard units called the ISO sensitivity scale.
>>294326>>ISOlolno
Digital camera ISO: Gain on the image sensorFilm ISO: Size of the silver crystalsbigger crystals pick up more light, but result in more grain
>>294352What's your problem?
>>294368He's on /p/, of course he's a dick.
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>>294368Film: ASADigital: ISO
>>294392Correct
>>294392>>294393WRONG, WRONG, WRONG!ASA stands for American Standard Association, ISO for International Standards Organization.ASA is just the old name, you should use ISO for both digital or analog.
DIN 4 lyfe <3
>>294392stupid
>>294398DIN is now called ISO Logarithmic Scale
film is reactive to light because of a light absorbant pigment that is put onto the film. Higher ISO have this distributed in larger bits, so to absorb light more easily. Lower ISO have this distributed in smaller pieces, and therefore have less grain but cannot absorb as much light.quite simple really.
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