Tokyo Kogaku Topcor 5cm F3.5 Leica L39 screw mount. Please consult about mount conversion. Released in 1955. It was sold as a standard lens for the Leotax K, compatible with Leica III. The unique two-stage aperture design was considered eccentric at the time. Made of an aluminum alloy, it's very lightweight. The F3.5 specification wasn't particularly high-performance even then, placing it as a popular lens. Due to its unique design, it wasn't a popular lens, but its strong character is now attracting attention from enthusiasts. I've prepared some sample photos using this lens. A characteristic feature is the rainbow-colored shower ghosting that appears when strong backlight is introduced. I took it to the night view from Sunshine City in Ikebukuro for some reason. I thought this bokeh soft-serve ice cream would definitely go viral on social media on New Year's Day, but it was a complete miss... but it's good bokeh. Due to the quality of the optics, the light source doesn't become soft and is clearly depicted. The high-speed light trails are a comparative light synthesis of 3 images. It's good that it's clear even when layered. It shows its true value in snapshots; it shows a shower of light when strong backlight is introduced, and it's moist in direct light. It's small and easy to focus, making it an easy-to-handle lens, and is recommended for first-time old lens users. The optics have no noticeable mold or haze, and there are some scratches on the front and rear elements. The exterior also has scratches from use, but it's shiny and beautiful without any noticeable dents. The operation is smooth. Condition: Clear depiction in test shots! Operation confirmed. Appearance: No noticeable dents, scratches from use. Optics: No mold or haze, scratches on front and rear elements. Operation: Tested with α7 Accessories: Front and rear caps Stored in a dehumidified cabinet. 2688 #Tokyo Kogaku #Topcon #Topcor #topcor #Leotax #Old lens *All lenses on sale have been tested with actual photos! *Evaluations are subjective. Please understand that these are used items. *Returns are accepted, so please feel free to contact us! (For items not discounted, you will be responsible for return shipping costs, please consult before evaluation) Other features... Old lens