Pretty sure it'll be a fine hair on the sensor. Probably hardly visible to the naked eye.
…neither would affect the image!Have you looked on the focusing screen or mirror?
+1It could be a Hair on the sensor.
+1Pretty sure it'll be a fine hair on the sensor.
I think it is fine hair on sensor because it can affect like this as you shared in the image.
..... else I would surely share over here.
Thanks everyone, was a hair on the sensor, it's gone now! Panic over