Durst Dutub 2 sliding zoom extension tube (10.5 cm – 1.4–2.6x / 5–4–6.5x) – a lens board extension tube for Durst enlargers such as the Laborator 900, 1200, 138, 184, M805, and others. Durst Dutub 2 Verlängerungstube, wie auf den Originalfotos zu sehen.
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