I should think that most photographers would pick up on the reference. But this explanation is for everybody else.
Here's some dodgy science.
Back in the olden days (pre digital) 35mm camera film had its own character and feel, which was largely derided from the way the emulsion surface, and silver halides in B&W film responded to exposure to light, both in camera and in the darkroom.
As light affects the emulsion, individual silver halides are activated and clump together, when developed and fixed, they apear as different shades of grey and form the picture. This chemical reaction has the side effect of producing 'Grain', which when you look at old B&W photos is considered aesthetically pleasing. The faster the film the bigger the silver halides and thus bigger grain. The trick back then was to take say ISO 400 film and expose it as if it was ISO 800 then 'Push process' it whilst trying to keep the grain as small and egant as possible.
Today in digital a similar problem occurs. As we raise the ISO the picture steadily becomes 'Noisy' until such time as the picture is so degraded as to be unusable. This is electronic instead of chemical.
So to the question in point.
It is vital with lower end digital cameras with small sensors, and slow glass to 'Watch the Noise'
So do yourself a favour and follow watchthenoise.blogspot.co.uk for more dodgy science.
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