Abnormal substance on back glass element of lens HELP!!!

[scmindseye]

My baby my beloved Canon EF 70-200mm F/4L series lens has this substance on the back and I have no clue what it is!

 

[scmindseye]

This is the substance.

March 18, 2011 | Facebook

 

[Markw]

Did you try to clean it? Does it impair image quality?

Mark

 

[2WheelPhoto]

I'll assist, some folks on this forum are fearful of clicking links. Here is the pic:

 

[Dao]

hum .... they don't look like fungus because the way it looks. Wonder if they are mold.

Did you have the lens stored for a long time?

 

[scmindseye]

Yes and no. I'm an official idiot and didn't have the back cover for it......... Can I clean this myself or should I send this $750.00 lens off to Canon (which would cost way too much...) and have them take care of it?

 

[tirediron]

Try to clean it yourself. Use a clean, lint-free cloth or piece of lens-tissue. "Huff" on the element to get a little bit of moisture fog and wipe gently. If that doesn't work, spring for some lens cleaning solution, and try that.

 

[KmH]

I'm an official idiot and didn't have the back cover for it.....

Officialy noted, and kind of makes the statement "My baby my beloved Canon EF 70-200mm F/4L" sound disingenuous.

 

[BIG PAPPA]

I'm having a similar issue, but luckily on my uv filter... My filter got spray on it from a splash park, my guess is the clorine reacted with the lens coating.