Hi Dick, Don and Giles Many thanks for the feedback on noise. Having done the experiments in the forest, I decided that the best way to cut out external factors was the lens cap or even the body cap - the result is much the same. I am interested in Giles' idea about the distribution and colour channels, a thought for the weekend.
Don, you are right, I am turning up the gain, but only because I know the noise is there and I have been trying to quantify it (I was staggered at the difference between different cameras under identical test conditions). Best, Nick WB. > Subject: FW: [PRODIG] Idle Musings on digital noise > > You are looking for pure noise with no subject detail... You > could photograph a texture-less white sheet, out of focus, at > different exposures; giving black to white, to see noise in > mid-tones, where it is more of a practical problem. =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
