It's a dirty old lens. Heavy for it's size, manual focus, and flawed. Wide open it creates a crazy ghosting, a white flash over your image. But, if you can find it's sweet spot, you can have some fun. The bokeh is amazingly circular, the flare is magical.
I took the Helios into the backyard for a few moments on quiet in the late afternoon light. The sun was just getting ready to fall behind the high trees in the wetlands behind our home. I had just a few moments left.
The color produced by the Helios never ceases to amaze me. It's warm and rich yet also muted and subtle.