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What is Happening to My Lens?

Started Jun 20, 2018 | Discussions thread
(unknown member) Senior Member • Posts: 2,180
Re: What is Happening to My Lens?
3

zackdezon wrote:

After using Pancro and a microfiber cleaning cloth on this lens that got a little sunscreen on it, this streaky, hazy area has appeared and it doesn't want to go away. My fear is that I've somehow stripped the coating. Anyone familiar with this? I've taken a few test shots with it and everything seems sharp so far. Haven't noticed any haze over the images, either.

Your coatings are damaged.  The front group will have to be replaced to remedy the problem, which is ~$350 from Canon.

You shouldn't use Pancro or other lens cleaning solutions on the 24-70 II, it has coatings with unusually poor durability.  The dilute acetone or isopropyl alcohol in that cleaning solution will degrade the coatings over time, culminating in the damage you see here.

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