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Anonymous
How does ISO speeds work? I know why its used, but now how it works
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>> Anonymous
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.
>> Anonymous
>>294326
>>ISO

lolno
>> Anonymous
Digital camera ISO: Gain on the image sensor

Film ISO: Size of the silver crystals

bigger crystals pick up more light, but result in more grain
>> Anonymous
>>294352
What's your problem?
>> Anonymous
>>294368

He's on /p/, of course he's a dick.
>> Anonymous
hahahahahaa http://www.youtube.com/watch?v=jshe65EE0So
>> Anonymous
>>294368

Film: ASA
Digital: ISO
>> Martin !iZn5BCIpug
>>294392
Correct
>> Anonymous
>>294392
>>294393
WRONG, 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.
>> Anonymous
DIN 4 lyfe <3
>> Anonymous
>>294392
stupid
>> Anonymous
>>294398
DIN 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.
>> Anonymous
zomg drillfinch! Get back in the car!