I just got my 7D around 2 weeks ago while shooting some long exposure, I check my photo and got this weird white tiny x mark when zoom. I shot some other angel but the mark is still on the same place on the frame. I try to clean the sensor by using a blower & tried other lens & it's still there.
here's a pic that i crop to enlarge it.
dust- by chuckbcb, on Flickr
Hope some guys here can help me.