Canon 60D Small Dot in Image

Was just playing around with my 60D today morning and saw a small dot in image when shooting against sky. Not sure if this is issue with lens or with sensor. I am using Canon 15-85mm lens. I didn't see any dust or fingerprint on my lens front element.

Any ideas what this is related to ?

HOSTED PHOTO
please log in to view hosted photos in full size.

HOSTED PHOTO
please log in to view hosted photos in full size.

Looks like dust on the sensor to me, use a blower if you've got one.

change the lens and put it at f/16, change it to manual focus and point it at the blue skies and shoot... then check if the dot is still there.

Cassiedup wrote in post #13527853
Looks like dust on the sensor to me, use a blower if you've got one.

Thank you for your reply. Also to note I am not using any filter. I am hoping this is common issue and not an issue with camera itself.

I cleaned up my sensor and the dot went away it seems like. Hopefully not a big issue. I am very careful changing lenses, but you can never be careful.

Cassiedup wrote in post #13527853
Looks like dust on the sensor to me, use a blower if you've got one.

Pixtaker808 wrote in post #13527861
change the lens and put it at f/16, change it to manual focus and point it at the blue skies and shoot... then check if the dot is still there.

That is a good idea, but I tried cleaning up sensor using camera function and it seems that dot went away.

Also one thing I realize with 15-85mm is that when lens is wide open at 85mm@f/5.6, I see dark corners in images. I am assuming this can be corrected as part of peripheral illumi correction function, PP or stopping down a bit.