Sparks | Sydney, Australia 2008 Bessa R2 | Voigtländer Ultron 28mm f2.0 | Efke KB50 | Rodinal 1:100 This negative is from a roll of film that I used for my first foray into 'stand development'. Rodinal 1:100 at approx 20°C for 60 minutes. Slow inversions for a full 2 minutes at the beginning and let set for an hour, do not touch. Water bath and fix. The negatives are stunning in detail and tonal range. I am a convert.