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New Contributor
Posts: 4
Registered: ‎11-11-2017

Lens is fogging up, not working.

I have a Canon t3 and when I came back from outside the lens turned extremly foggy. I checked the internal lens, and the external and both seemed not foggy, but when I turned it on again it was still foggy. Even right now it is still foggy, help???

Respected Contributor
Posts: 1,765
Registered: ‎12-02-2012

Re: Lens is fogging up, not working.

[ Edited ]

It was cold outside so the glass did in fact fog up when you came in. 

 

You can minimize that by taking a couple of large airtight bags out with you.  Before you come back in put camera in one, lens in the other and push the air out before sealing. This will minimize the amount of moist air available to make condensation on the cold glass. Leave in bags an hour or more in a warm place until they warm up. 

 

If you do nothing the camera will just warm up and the condensation will evaporate, but if you do that frequently and water spends a lot of time in the lens you can get fungus growing on the internal glass elements and you can't get rid of that. 

Scott

Canon 5d mk 4, Canon 6D, EF 70-200mm L f/2.8 IS mk2; EF 16-35 f/2.8 L mk. III; Sigma 35mm f/1.4 "Art" EF 100mm f/2.8L Macro; EF 85mm f/1.8; EF 1.4x extender mk. 3; EF 24-105 f/4 L; EF-S 17-55mm f/2.8 IS; 3x Phottix Mitros+ speedlites

Why do so many people say "FER-tographer"? Do they take "fertographs"?
VIP
Posts: 8,242
Registered: ‎12-07-2012

Re: Lens is fogging up, not working.

One of two, 1st the lens is a not a Canon lens and 2nd if it is, it has lost its seal.  If it indeed has lost its seal you may never get the moisture out. Call Canon service.

 

If it is not a Canon lens, you get what you get!  Who knows?

A lot of Canon stuff. Along with, a lot of other stuff.
New Contributor
Posts: 4
Registered: ‎11-11-2017

Re: Lens is fogging up, not working.

Worked, I did some rice instead thank you!

Esteemed Contributor
Posts: 3,798
Registered: ‎06-25-2014

Re: Lens is fogging up, not working.


ebiggs1 wrote:

One of two, 1st the lens is a not a Canon lens and 2nd if it is, it has lost its seal.  If it indeed has lost its seal you may never get the moisture out. Call Canon service.

 

If it is not a Canon lens, you get what you get!  Who knows?


"Lost its seal"? Since when is the kit lens on a T3 sealed against air leakage?

Bob
Boston, Massachusetts USA
VIP
Posts: 8,242
Registered: ‎12-07-2012

Re: Lens is fogging up, not working.

Robert do you not have better things to do except read a post with a magnifying glass?  Sealed as in terms of keeping moisture out.  Not as scuba gear, need I say that to clarify, too?  This lens obviously got water inside. 

It probably needs disassembly and reassembly. That needs to be done by Canon.

 

"Air", who mentioned air?

A lot of Canon stuff. Along with, a lot of other stuff.
Esteemed Contributor
Posts: 3,798
Registered: ‎06-25-2014

Re: Lens is fogging up, not working.


ebiggs1 wrote:

Robert do you not have better things to do except read a post with a magnifying glass?  Sealed as in terms of keeping moisture out.  Not as scuba gear, need I say that to clarify, too?  This lens obviously got water inside. 

It probably needs disassembly and reassembly. That needs to be done by Canon.

 

"Air", who mentioned air?


Air (in particular, humid air) is what brings the water in. Fogging occurs when the lens gets cold and the water condenses out on the glass elements. You knew that. Haven't I seen you write about that very process?

Bob
Boston, Massachusetts USA
VIP
Posts: 8,242
Registered: ‎12-07-2012

Re: Lens is fogging up, not working.

"You knew that."

Gee, I believe you are right.

 

"Haven't I seen you write about that very process?"

Quite possible.

A lot of Canon stuff. Along with, a lot of other stuff.
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