An 84 seconds exposure with a Neutral Density (ND64) filter of which 20 seconds were to compensate for the Reciprocity Failure as per manufacturer's specifications. The 25 ISO film really helps to get the exposure, see also here.
Film: ADOX CHS 25 ART at EI 25, developed in APH 09 1:80 for 12 minutes. ND64 filter.
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