Lens internal dust
Jul 1, 2017 15:05:34 #
Jul 2, 2017 02:53:27 #
Jul 2, 2017 07:24:45 #
billnikon
Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont
Retired60 wrote:
How much internal dust in new lenses today is acceptable?
In a NEW lens, NONE. If there is dust in the NEW lens, return it, cause it ain't NEW.
Jul 2, 2017 07:27:06 #
Retired60 wrote:
How much internal dust in new lenses today is acceptable?
If they only time you can see the dust is when you examine the lens closely, don't worry about it. "Dust happens." I've never heard of a lens becoming unusable because there was so much dust inside.
"Once you spot lens dust, what should you do with it? The answer is – nothing."
https://photographylife.com/what-to-do-with-dust-inside-lens
Jul 2, 2017 08:09:14 #
Small scratches and dust doesn't show up in your pictures it is not in the focal length of your camera ,But fungus does cause problems since it blocks the light and makes the picture unclear, Now scratches sometimes will catch light rays and cause some problems flare. Howie
Jul 2, 2017 08:22:02 #
jerryc41 wrote:
If they only time you can see the dust is when you examine the lens closely, don't worry about it. "Dust happens." I've never heard of a lens becoming unusable because there was so much dust inside.
"Once you spot lens dust, what should you do with it? The answer is – nothing."
https://photographylife.com/what-to-do-with-dust-inside-lens
"Once you spot lens dust, what should you do with it? The answer is – nothing."
https://photographylife.com/what-to-do-with-dust-inside-lens
Excellent tips !!! ~FiddleMaker
Jul 2, 2017 09:42:46 #
Jul 2, 2017 14:05:22 #
Jul 2, 2017 14:14:21 #
Leitz
Loc: Solms
Retired60 wrote:
How much internal dust in new lenses today is acceptable?
It is not uncommon to see a slight amount of dust even in a new lens. If it shows up in your pictures, it is unacceptable.
Edit: It is sometimes incredible how much crud in and on a lens it takes to actually affect a picture.
Jul 2, 2017 19:52:44 #
amfoto1
Loc: San Jose, Calif. USA
Virtually every lens has a few specks inside, right from new. Most lenses are not assembled in "clean rooms"!
If you shine a flashlight through from the opposite end while inspecting the lens wide open, you will nearly always see some specks.
But as long as ther aren't many, they have no effect on image quality... so don't worry about it unless there's a great deal of dusy, really large chunks of something in there, or it looks like fungus is growing inside the lens. Those conditions do need attention... but a few specks of dust... or even a few tiny bubbles in the glass itself, make no difference. In fact, a lot of people thing a tiny bubble or two is usually indicative of ultra high quality glass.
Unless it's something really large in or on a lens, it will not show up in your images. Only dust directly on the camera's sensor shows up in images, and even that's greatly out of focus.
A lot of dust or haze or fungus in lenses can increase flare and reduce resolution and contrast... but won't actually be visible.
If you shine a flashlight through from the opposite end while inspecting the lens wide open, you will nearly always see some specks.
But as long as ther aren't many, they have no effect on image quality... so don't worry about it unless there's a great deal of dusy, really large chunks of something in there, or it looks like fungus is growing inside the lens. Those conditions do need attention... but a few specks of dust... or even a few tiny bubbles in the glass itself, make no difference. In fact, a lot of people thing a tiny bubble or two is usually indicative of ultra high quality glass.
Unless it's something really large in or on a lens, it will not show up in your images. Only dust directly on the camera's sensor shows up in images, and even that's greatly out of focus.
A lot of dust or haze or fungus in lenses can increase flare and reduce resolution and contrast... but won't actually be visible.
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