Exposure insanity

Started 9 months ago | Discussions thread
dosdan Contributing Member • Posts: 540
"The Physics of Everyday Technology"

Detail Man wrote:

A certain indecency attaches to such imaginary vectors aimed squarely at public exposure:

The higher the ISO sensitivity the more noise, or grain, appears in your photo. The extra charge running across the image sensor creates electrical interference (and sometimes heat) which is then recorded by the highly sensitive photosites on the sensor. So ideally, we keep the ISO as low as possible to make for a cleaner picture.

Oh, that explains so much!

I suppose the same principle applies when listening to a weak AM station. Because the AGC in the radio receiver turns up the gain, the radio is working harder and it MUST RUN HOTTER. Would you recommend applying a desk fan to a radio set under such demanding listening circumstances?


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