We are trying to do a calibration of a Sony A7 camera with a coastal optics 60 millimeter UV-Vis lens.
Using your protocol, would it make sense to use a cosine corrected irradiance probe to measure the light coming off the standard? I have an ocean optics/insight lamp and system designed to calibrate using that probe so it seems to be my best option.
Second, you mentioned punching a hole in a piece of electric tape and placing it over the standard. Why do you suggest that? Is it important?
I did not see these questions addressed elsewhere in the forum. Thank you.
As far as I can tell it’s not important if you use a (correctly calibrated) cosine corrector or not, as long as you are confident about having reliable absolute irradiance measurements (in energy, not photons). The tape helped me select the same area in each frame. We now are using images of the optic fibre cable, with an automated ROI selection script which makes the use of a spectralon standard obsolete. It was a convenient low-tech solution at the time, given what I had available as a first-year PhD student.