Quote:
Originally Posted by alpal
What causes the doughnuts?
Could it be a relection off the OAG?
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The dark donuts are dust motes on your MPCC. I don't see any reflections.
What you can do is get the nosepiece out. Then you have 19mm from the camera face to the sensor. You need to place the back glass of your MPCC at 55-19 = 36mm from the camera face. Just blow some hot air with a hairdryer in the camera body before running it and dry it out when you're finished too.
I have two dessicant plugs on each side at the back that I microwave 10s everytime I use the camera. The pink type that turn blue when it's dry.