Photo Engineer, thanks for the response,
Originally Posted by Photo Engineer
I actually am familiar with calculus, so feel free to discuss more in terms of it, I actually prefer more technical explanations.
Could you work out an example? Lets say I have a spectral power distribution where the spectral irradiance is as follows: between 450 and 451 nm, the spectral irradiance is 7 erg cm^-2 s^-1 nm^-1 and at every other wavelength the spectral irradiance is zero. What would the exposure be for the blue layer in lux-seconds for Kodachrome 25? I would like to see an example worked out so I can find the error I think is present in my calculations. You can just give me the approximate value (no need to actually integrate over that 1nm range, just approximate using a riemann sum of 1 rectangle to keep calculations simple)
I noticed that the exposure in the spectral sensitivity curves for kodachrome 25 is a radiant exposure
but the exposure on the H-D curve is a luminous exposure. Ive accounted for that in my conversion by involving the luminous efficiency function, I think this may be where my mistake lies, theres a detail(s) Im failing to account for.