Sensor dust is an issue with most interchangeable lens cameras, and some more than others. My old Sony A6000 was particularly badly affected, as this landscape image shows. The closer you look at the sky in the top left region, the more spots you see. In fact they are everywhere, all across this image.
Spot (sensor)
The sensors in interchangeable lens cameras are prone to picking up specks ion dust which appear as small black spots in your images. Sensors have anti-static coatings and sensor cleaning mechanisms designed to repel and shake off dust particles but they often persist despite this. They can be removed with manual sensor cleaning or by using dust removal tools in software. Cameras with interchangeable lenses do not have sealed interiors and the sensors can pick up spots of dust. These can be removed in software using spot removal tools – you dab on the dust spot and the software uses nearby pixels to cover it up. It’s like cloning but easier, because you can leave the software to ‘heal’ the spot automatically.
BAN adjustments in Lightroom (BAN – Basic And Necessary!)
There are a handful of basic tweaks you just know you’re going to want to apply to each image.