Terra Australis wrote:
That is a good start. Definitely not pterodactyls then.
Now get a woman's makeup brush that has not been used and brush the underside of the focusing screen being careful not to touch the mirror.
I suspect that you have two unrelated problems;
1. dirt in the finder
and
2. dirt on the sensor.
Oliver
Thank you Oliver. That's interesting. I am rather nervous of brushing anything inside the camera, but I could contemplate it after my next job.