Leitz Canada 39mm front lens cap.  type_Optical Remote This Hugo Meyer Portable Range

This Hugo Meyer Portable Range Finder is a shoe-mountable rangefinder with a range of 2

but that's not the case: you can use this lens on anything with an M mount

with softcase

It's also a "Macro" in the sense that it has a close-focusing mode that provides magnification to 1:5

Because this is a thread-on diopter

Leitz Canada 39mm front lens cap. &nbsptype_Optical Remote This Hugo Meyer Portable RangeLeitz Canada 39mm front lens cap in excellent condition. Fits lenses with 39mm (E39) filter threads such 35mm and 50mm Summicrons. Has an internal 1 4 20 screw to mount beneath an appropriate Leica Ever ready case when not on a lens.