Threaded Nikon Lenses

Not sure what you mean. The Brevis, like the Redrock, uses a Nikon mount that accepts all Nikon F mount lenses, which includes most of them. The F mount locks the lens in place just like on an SLR still camera.
 
Jay...you've got the M42 mount on there. The Pentax M42 is a threaded lens mount..and the Nikon certainly isn't :-) Emailed you instructions to swap them....
 
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