I have a 7D with a 70 - 200 F4L with a proper solar filter. I have been practicing taking pictures of the sun in preparation for the eclipse and it does not appear I am getting good focus. - Settings I am using for the full sun - ISO100, F8 with a tripod and solar filter. I have several more days and I am looking for advise. I can't wait to experience the eclipse, would love to get a few good shots of it as well.