I find that AllPhotoLenses online provides a nice concise summary of these vintage lenses.
Below are some photos I took around the downtown neighborhoods of Phoenix, Arizona using the Samsung NX1 with the the Konica 50mm.
Note: This 50mm lens is 75mm on the Samsung NX1 based on the APS-C Sensor's crop factor for attached full frame lenses.
All photographs handheld. No filters were used and the photographs as shown 'as-shop' (no post-editing). Applied JPEG compression for web display.
Outdoor shots here were in the late winter afternoon sun.
I was curious to see how this lens would capture holiday lights - nice.
Learn More about this Konica Hexanon AR 50mm - LINKS below: