crappers! saw some consistent marks on a couple of shots today, and I went through the procedure to check for stuff on the sensor. Sure enough couple of spots on it.
Geez and I was trying to be careful with it to boot, always pointed it downward, never changed lenses outside. Guess there must be more dust floating around in my truck than I had imagined.
oh well, time for a rocket blower I guess.
what's the consensus on sensor brushes. Is it worth it to get them or is more like any particles that resist the blower are gonna need a wet swab anyway?