View single post by GeoffR
 Posted: Tue Jun 4th, 2019 02:44
GeoffR

 

Joined: Thu Apr 12th, 2012
Location: Denham, United Kingdom
Posts: 293
Status: 
Offline
I am inclined to think that the camera was left in a bag or on a shelf with the body cap not fitted correctly. The dust just gathered over the time it was kept as a back-up and got on to the sensor when it was checked occasionally. If you aren't using a camera regularly it is easy to forget to check the sensor cleanliness.