|
Reflection. You have something that is a bit shiny in the imaging train.
Look down the lens with a torch and see if there is something shiny.
You can also make a baffle out of some thin black cardboard and tape it to the lens hood to stop it down a tad. Or get a large step down ring and use it as a baffle.
Or try moving the view slightly. It'll be a bright out of field star. Move the view a bit and it may disappear.
Greg.
|