I recently purchased a Star Analyser diffraction grating with the aim of measuring spectral response curves (is this the right terminology?) of my DSLR cameras. What I want to determine is the individual red, green and blue channel curves and compare these with standard BVRc filters. Does anyone have a step by step tutorial for doing this?
From these filter response curves it should be possible to calculate coefficients for transforming instrumental magnitudes to standard BVRc magnitudes. I've determined emprical transformation coefficients from observations of standard stars but it would be an interesting exercise to calculate them from filter response curves. Cheers,