Dave Jerrard | Off-Axis Reflections and Dust Flares @DaveJerrard | Uploaded 12 years ago | Updated 1 hour ago
Time to clean this lens. This shows several large off-axis reflections again, as well as a lot of dust reflections, caused by dust on the lens casting a lot of forward-scattered light into the lens, so they act light small point-light sources, with their own reflections everywhere in the field of view.

Got a bit of dust on the sensor too, causing the large dark spots. Time to clean that as well.