The image below was a closeup shot of a portion of the lights that my neighbor had hung on his fir tree for the Christmas holidays. It was my intention to defocus and distort the appearance of the lights [virtually point light sources]; ie. In the process of defocussing, they appeared to increase in size. Moving from a group of circles to one large one....this lifebuoy ring was on board a boat that took us on a fjord cruise from Killary Harbor, Ireland. While not quite a circle, this elliptically shaped mirror was a good candidate for OYGIF.