I can't say I know much about it to offer advice. It makes sense that if the lens cap is on no dust or dirt could be recorded, so I'm assuming those are dead or hot pixels which apparently is normal to a degree. Do you always use the same lens? In other words any chance the spots are on the rear element? Be interesting to see the actual picture of the white cardboard. Article I'm sure you've read.Thanks guys for all your posts.
Now I'm getting confused because no idea what I'm having here
Did try a couple more times with 3 swaps, like Warren said, the spots seems to move place when I clean, not being able to remove them.
This is how my sensor looks like. Comparing with the image I uploaded in my first post, spots moved place.
View attachment 17351
I then took Bleirer and Rassie advise and took an image with the lens cap on. And this is what confuses me since I get a different set of spots.
View attachment 17352
I live in Portugal so the air blower Palouse mention is not available in Europe.
Did look at Amazon but the customs I would need to pay for it, I would buy 3 of them
I ended up ordering one of these https://www.amazon.co.uk/dp/B07LFV6QW6/ which has also an air filter.
I will look at the Eyelead Sensor Gel Stick that Woodpecker mention, and also that technic of holding a vacuum cleaner near while we blow air might work, pulling any air particle away... I hope
I did on youtube some people using this also https://www.amazon.co.uk/dp/B001B9RI5O/ . It amazes me how all this stuff can be expensive.