dust in lens, what to do?

I looked at my 50mm lens yesterday and I see some kinda dust INSIDE the lens, as in between the glasses.... what do i do with that? and how did that get there?

There have been about a half-dozen threads on lens dust in the past few weeks. If you want to do a search, I'm sure you'll find some interesting information. Bottom line, though, is that dust in the inside of the lens does not matter optically. Lenses are not air-tight, so dust can get into the lens and between the lens elements. It happens all the time, and if you look into most lenses, you'll probably find dust.

So my suggestion is, don't sweat it.

Mark

I agree with Mark. I think all of my lens have dust in them. I have even spent the time to do some test and try to make the dust show up in the picture. I have never seen any of the dust inside my lens show up in my pictures.

Actually just incase you find the thread, There was a user on here who had the same problem with the same lens. He took it apart and got the speck of dust out somehow, but I would NOT reccomend that by any means.

I would reccomend doing a test. What I usually do for dust or specks is shoot at a plain blue sky, or find a white wall set it in M mode for a long (longer than 1 second) exposure and very small appature just keep moving the lens untill the shutter closes. That way the speck should stay in focus while everything else is blurred. Chances are you probbly won't be able to notice it, but if you do notice it I think the best possible solution is to send it to Canon.

I have a damn streak from my lens cleaning solution on the 17-40mm but I tested it and it doesn't seem to affect the quality so I guess I'll leave it.

I have to agree with the others, what to do is just ignore it and go back to enjoying shooting with it untill it affects image quality then deal with it yourself or have it serviced/replaced. Just a fact of life, dust will get in places.

oh ok, I feel better, thanks.... so far I don't see it on the pics so I'll just leave it along.

ghaleon109 wrote:
Actually just incase you find the thread, There was a user on here who had the same problem with the same lens. He took it apart and got the speck of dust out somehow, but I would NOT reccomend that by any means.

I would reccomend doing a test. What I usually do for dust or specks is shoot at a plain blue sky, or find a white wall set it in M mode for a long (longer than 1 second) exposure and very small appature just keep moving the lens untill the shutter closes. That way the speck should stay in focus while everything else is blurred. Chances are you probbly won't be able to notice it, but if you do notice it I think the best possible solution is to send it to Canon.

I have a damn streak from my lens cleaning solution on the 17-40mm but I tested it and it doesn't seem to affect the quality so I guess I'll leave it.

That technique will work fine for dust on the sensor, but there's no way you're going to see anything from a spec of dust inside the lens.

:o I thought I was might be saying something wrong. Sorry if I confused you guys, I think I was saying lens and meaning sensor But yes, dust on/in the lens is usually not recognizeable. Thanks for the correction Mcohran