4 ms·

Does this hold for all types of film? For example, how small can the grain structure be?

• AuryGlenz 6y ago
  It can be quite small, but I believe it largely depends on the ISO rating of the film. Larger grain = more light collected. I shoot wetplate collodion sometimes and that has an effective ISO of under 2 and the detail is astounding - especially for a process that’s 150 years old.
• matthewmcg 6y ago
  Interesting question! Actually all photographic imaging systems run into physical limits set by the quantized nature of light. So even if you could shrink things down to one molecule, you’d have other problems first, principally an effect called “shot noise.” Essentially, a film grain or a cell on a CCD sensor is like a “bin” that collects and counts photons. As you make the area of the bins smaller, there are fewer photons collected in a given image, and statistical fluctuations from sampling become more relevant. You get more “noise” in the final image. See https://en.wikipedia.org/wiki/Shot_noise https://en.wikipedia.org/wiki/Shot_noise
  • neltnerb 6y ago
    With the exception that holographic film images the diffraction pattern produced by two interfering laser beams, so typical grain size there has to be on the order of tens of nanometers. It can certainly be done, just is pointless for normal film =)
  • mikorym 6y ago
    Those physical limits are surely though at a much finer resolution that common high end digital cameras? I understand that you are saying that you see the effects even if you are not a the "molecule" level as you say, but I would think that the hard theoretic limit of photons should be at a finer granularity than high end digital cameras.