[ACD1999]

同埋點解高iso會多d noise ? ??

[pingu_hk]

http://www.astrophys-assist.com/educate/noise/noise.htm

in simple words, high ISO use ampification to increase the signal (AND the noise), without changing the signal-to-noise ratio

There is one measuring method to increase the signal-to-noise => "Fourier transform method"

Another practical method is to use the CCD/CMOS at lower temperature

[maximilianyuen]

到 google 查躁點夠你看成日…
遲雖然大陸網都係copy and paste...