So this is one of the photos I took at the start of the Fastnet. I’ve fiddled around dramatically to show the “spots”. This is the junk I’ve that’s been on my lens for a bit, but use it in an environment with a bright background, and it will clearly show up. On running some tests, I also found a small hair? that showed up as a splodge at fast shutter speeds, and at three seconds it could be seen clearly. Here be a lesson to us all! This photo is full size so see it in all its gory detail!
Shure !