Nikon F accessory mounting shoe brand_Konica This is an extremely rare

This is an extremely rare Leica thread mount variant of the original Voigtlander 50mm f1

The RF mode is a magnified image of the rangefinder only- basically an optical version of the Live View zoom mode on newer mirrorless cameras that makes accurate focusing easy

Fine grained

dispensing with the multiple helicoids of a unit focusing lens for a single moving front element that kind of partially unscrews to focus

Canon EF 100mm f2

Nikon F accessory mounting shoe brand_Konica This is an extremely rareIt's a Nikon F accessory shoe, meant to hold a flash or similar small accessory with compatible mount. This is a cold shoe, so if you're using it for flash work you'll need a separate cable (not included) to connect the flash to the camera.