Leitz Summar, Elmar 5cm 1:3 extension tube  type_Filters I'm assuming that this was

I'm assuming that this was the absolute cheapest lens that it was possible to make

A nice little semi-pocketable rangefinder camera in great shape

Mamiya-Sekor C 180mm f4

You can also use it as a small circular softbox with the included diffuser panel

Note that this lens can not focus to infinity: it is for high-magnification macro use only

Leitz Summar, Elmar 5cm 1:3 extension tube &nbsptype_Filters I'm assuming that this wasThis extension tube for LTM 39mm thread mount Summer & Elmar 5cm lenses is designed to provide 1: 3 magnification. No rangefinder coupling. In very good condition, with minor paint and finish wear.