Flares like the 70s

Time flies like an arrow, fruit flies like a banana, flares like the 70s.

Old Russian Jupiter-8 lens. When wide open (at f/2) it flares like this whenever the sun is in front of it. We have a choice. We can complain about the poor quality of the optical coatings, or we can have rainbows magically inserted into our photos.

My choice? Rainbows, please!