This is a photo I took of the sky on a clear day. I’ve called out a few areas of the photo to show at full size. As you can see there are three very noticeable spots. I’ve tried cleaning the lens and using a blower (very gently) on the low-pass filter. That’s pretty much all I can think to do and the spots are driving me nuts. Any suggestions?
[Update: So I’m hoping that this turns out to be a bit of dust on the sensor and that I can find someone trustworthy to give it a swipe. Thanks for the feedback.]