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Old 04-17-2019   #2
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Moto-Uno is offline
Join Date: Jan 2011
Location: The Wet Coast
Posts: 1,704
It's the focusing rack . The lens should slide out of the body onto this rack which is then brought into focus by turning either of the knobs . The assembly should be mounted to fold out flap . I'm sure a search on Flickr will illustrate it . Peter
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