I own a Nikon D5300 camera.
I have had problems with circular blotches appearing in pictures. They were not noticeable on many of the pictures but were more visible when the background was a situation like a clear blue sky.
I think these were caused by dust on my sensor and I got the sensor professionally cleaned around 4 weeks ago. Since then I been outside taking a lot of pictures on 3 days but have not changed the lens at all.
However when I took some pictures earlier today the ones which contain clear blue sky still have one circular blotch. Please find one of these picture attached. The blotch is quite faint and situated to the top right of the tree.
There were some other blotches on my pictures before so the cleaning did seem to get rid of a lot of these. Do people here think the remaining blotch was left over from the cleaning or has it probably just appeared since then? Are the Nikon D5300 cameras prone to getting dust inside them? What would the solution to this blotch be? Could I possibly be able to clean this sort of mark from the sensor by myself? Would it be suitable for cleaning with an air blower?
Thanks for any help here.
Derry