Your question seems to be mis-categorized under slide projectors, if you are asking about Rollei 35 SE camera, the lens will only retract if you cock the shutter with the wind lever, then press the button next to the shutter release and rotate the lens a few degrees.
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Your question seems to be mis-categorized under slide projectors, if you are asking about Rollei 35 SE camera, the lens will only retract if you cock the shutter with the wind lever, then press the button next to the shutter release and rotate the lens a few degrees.