For reference, and if anybody wants to discuss. I'm including these times for Ilford PanF+ 50 because Kodak's times listed in their J-109 appear to be far too short and generate very low contrast negatives.
I've made these exposures as carefully as I could and eliminated as many variables as I realistically could. While it is not scientific, and certainly not up to ISO or probably manufacturer standards, it is as accurate as I can make it with what I have available to me, and certainly...