First, the images shot with the Wratten filter on Ilford were almost non-existent. Some image did record, so it might be possible to determine a speed at which an acceptable image would result. The Konica sequence recorded well. Second, upon examining the bracketed sequence, I noticed another dissimilarity. Both Konica and Kodak films are very sensitive to exposure.
Overexposure tends to create images which are almost all blacks and whites with no middle tones.
This tendency was very apparent in the Konica bracketed sequences. Stepping through these sequences, I could see the contrast of the sky-clouds combination increase and see the deciduous trees emerge from the darker coniferous background. With the Ilford film, however, the image appeared to become denser without a shift in tones. It should be noted that this lower apparent contrast is considered by Ilford as an improvement over other extended red and infrared films. I printed the frames that appeared to be exposed best using the method I have described in previous articles.