One of these fell into my hands a few months ago. It belonged to the seller's father, who enjoyed photographing Warsaw Pact activities from afar...I should say so! Information on how best to "deploy" this monster was hard to come by, though sandbags came up alot. What's being used today is Reis' heaviest wood tripod and a Wimberley Mk II head with P-50 plate. On the camera end is an F-1N with focusing screen SK, which gives a surprisingly bright viewfinder image. Focusing is an acquired technique, as is timing the shot with breathing and smoooooth shutter release...I cannot say it's mastered yet! The lens has a built-in drawer which accept s48mm threaded filters, so I replaced the uncoated Canon plain glass (UV?) filter with a multicoated Hoya skylight 1B. Last week it went out to Morro Bay and shot things around the harbor, including this dredging ship, on Fujichrome Provia 400F. Atmospherics were calm and clear, though not crystalline. In this picture fine detail like individual chainlinks can be seen, maybe next time I'll try ISO 100 and those sandbags!