Greg disgraces himself: > > I set the aperture to f128 which would be f32 on the US system. Brian Asks: > f/128? Focal length divided by 128? This is *different* on the US > system??? Really? How? The 'US system' is the 'Uniform System' - an early aperture 'standard'.. At that same time 'Intensity Ratios', were evolving and would later become the f-stops we know today (intensity ratio being the ratio of the focal length to the size of the aperture) you can find more at: http://www.ai.sri.com/~luong/photography/lf/shutters.html karl
