I carried a Carl Zeiss (aus Jena?) 50mm f/1.7 Planar affixed to the Sony A7Sii while on walkies the other day. I was curious about how the lens would render a few subjects.
The Planar formula is quite old, being developed by a Zeiss designer before 1900. However, it is an excellent design as the image above demonstrates. My instance is quite sharp, the colors are rendered well, and the out of focus areas very smooth.
I need to find a subject with specular reflections in the background or some lights to see how those will render. I like the lens.
Walkies were good. The weather is cooler, as evidenced by the overcast. Life is good.