I took some photos of Mt Fuji from a distance with a 28-70 at prob something like 60mm f8. To my horror when I got home and fired up Lightroom there were severa

I took some photos of Mt Fuji from a distance with a 28-70 at prob something like 60mm f8. To my horror when I got home and fired up Lightroom there were several, very visible, dark blotches against the bright clouds around the summit. I learned my lesson and will often use an air spray squishy thing to get rid of dust from the lens.