The Great Wall has a m39 bayonet, though other than the standard 90mm f3.5 lens included with the camera, no other lenses were produced. However if you attempt to use m39 35mm range finder lenses or enlarger lenses, you can achieve macro shots. Which is very useful because of the limited 1m close focussing on the Great Wall and the rarity of m39 extension tubes and bellows.

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