So how do you kids feel about dust in a lens?? Just got a used 50D 1.4 with some dust in it... a couple tiny flecks and one bigger speck... so far I haven't noticed it affecting my pics but I've haven't used it that much yet... really liking the lens thus far but is the dust thing gonna rear it's head at some point soon?
Thanks Howard, your helpful comments and reference. In my case the dust was on the second lens from the front. I had it cleaned for about 60$. In future I will check if there is any effect before going through that expense. Neil
Howard beat me to it. Unless the dust isn't really dust (ie it's chunks) it won't show up in your images. It takes a truly amazing amount of interference to be visible. In addition to the link above (which directly addresses dust), have a look at this one that shows just how bad it has to get before you see stuff in the image. Executive summary: the lens has to be scratched in a pretty major way before ANYTHING is visible. This is FAR more than what you will find with virtually any kind of dust or dirt.
_____ Brian... a bicoastal Nikonian and Team Member
My gallery is online. Comments and critique welcomed any time!
I purchased a brand new 70-200 VR II and it had a big old dust particle stuck to the inside front element. All upset that a $2400 lens was dusty I returned it to find the next new unit also had dust in the barrel too. I got over it and have never given it another thought as it's just too far away from the sensor to matter.
The trick is not to look into the lens, especially not with a flashlight, or you might get scared. But seriously, there is always be dust inside lenses, just the amount varies, and it usually not affects images unless it is very large and sits on the rear element of wide angle or fish-eye lenses.