"Exposition of this room in the school was 2700 seconds (or 3/4 of a hour) on photographic paper EfKeBROM."
"ZOOM ©ame®@ obs©u®@ ex©ent®ic@ Ba®i©@ (cardboard box 150x265x325 mm) constructed by Manufa©tu®@ obs©u®@ ©®oati@ for takes on photographic paper 18/24 cm, f 135 - 235 mm. Two pinholes Ø=318 mmicrones, one central and the other shift 1/3 (for high motives)."