Experimenting with IR. The Harrison filter works, but I need to learn more about post-processing the image. Much better with the 5700 than with the D70 (using the same Harrison IR filter for both - 52mm adaptor for the 5700; 105mm macro on D70 takes 52mm filters directly).
Any IR suggestions? Particularly post-processing. Here I simply extracted the luminance channel, extended the levels to cover the entire histogram, and applied a mild USM.