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32 votes
Accepted

How to spot dust in images quickly while doing a shoot outdoors?

The dust isn't on the lens — it's on the sensor. Dust on the lens will not resolve so clearly. To check for it quickly, set your aperture to the smallest your lens can support. (Small apertures have ...
mattdm's user avatar
  • 143k
9 votes

What are these pixel-level discolored specks? How can I fix it?

I ran a few more tests. Here are the results: No change to sensor: f/2.8, 1/6", ISO 200 Blue specks (similar to the top speck in the sample pictures) f/10, 2.0", ISO 200 White specks (similar to ...
zli's user avatar
  • 317
8 votes

Why are there black dots on all photos taken with Sony phone?

Looks really bad. Normally, dust gets on top of the stack of optical filter which sits above the sensor. It then shows as small blurry disks which get smaller and darker at narrow apertures because ...
Itai's user avatar
  • 103k
8 votes
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Why are there black dots on all photos taken with Sony phone?

It's highly unlikely that this many pixels on the sensor would become "dead" in quick succession, or in this pattern (groups of pixels, rather than individual pixels). This is clearly dust directly ...
digijim's user avatar
  • 1,057
7 votes
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Is this dust on lens or something else?

Looks like dust to me. But, it'd be on the sensor, not the lens. You're shooting into the sun - and if you're using an auto-exposure mode, then your camera likely stopped down. Stopping down ...
OnBreak.'s user avatar
  • 20.5k
6 votes
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Dust spot or scratch?

I'm a bit worried about a potential scratch to my d7000 sensor as shown in the rather grainy image below. Scratching the sensor itself is unlikely to happen. The sensor itself is typically behind a (...
StephenG - Help Ukraine's user avatar
5 votes
Accepted

Are mirrorless cameras more susceptible to sensor dust?

The air is full of dust. It's floating around everywhere all the time. When you open the lens in a dusty environment (which is to say "every environment that isn't a clean room"), dust gets into the ...
mattdm's user avatar
  • 143k
5 votes

Are these soft blotches caused by dirt on the sensor?

Perhaps. Your supplied example doesn't show obvious dust. You can get a 'clearer' view by stopping down to f22 and taking an out-of-focus shot of a featureless wall or clear sky. Shutter speed doesn't ...
BobT's user avatar
  • 6,694
5 votes

How to spot dust in images quickly while doing a shoot outdoors?

I agree with mattdm, dust in images are usually found on or near the sensor. They are usually visible at small apertures, like F16-32. Some thoughts and points to consider on this topic: You can ...
xiota's user avatar
  • 26.9k
5 votes

What are these branching, dust-like particles? How to prevent their spread?

This is a fungus. It should be ok to take pictures with that - but only you can check that. Take some test shots of blank surfaces with different apertures, focal lengths and light coming from ...
oaaya's user avatar
  • 151
4 votes
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From Linux shell, how to batch-remove dust from images using scan of dust?

Dust removal using a dust mask can be done with G'MIC with the "Inpaint [Multi-Scale]" filter. The easiest way to use G'MIC is as a plugin for GIMP, Krita, or Paint.NET. However, it is available as a ...
xiota's user avatar
  • 26.9k
4 votes

Is it a fungus or something else?

If the soft white dots have tiny little tendrils coming from them it's probably, fungus or pollen. Here's my suspicions...
slvjoe's user avatar
  • 131
4 votes

Is this dust on lens or something else?

Dust on the surface of a lens is unlikely to image. Dust or smuts on the lens simply blocks some of the exposing light. A dusty lens induces flare that robs the image of some of its contrast. On the ...
Alan Marcus's user avatar
  • 38.7k
4 votes
Accepted

Focus motor problem in lens due to fine dust particles

Here’s what I did in the end: First of all, opening up the lens is not a good idea. It’s a complex and delicate system, and if you don’t have experience in this area, avoid disassembling the lens. ...
Ali Parsai's user avatar
4 votes
Accepted

Dust inside lens result incomplete images

As noted, dust on the front of the lens will almost never show on photos - see this famous LensRental review on Front Element Scratches Dust on the rear element may make a slight impression - though ...
Tetsujin's user avatar
  • 23.1k
3 votes

Is this dust on lens or something else?

There are several dust spots on your sensor, but the long wiggly looking thing is probably a fabric fiber or small hair on the sensor, or more precisely, on the front of the filter stack in front of ...
Michael C's user avatar
  • 175k
3 votes

Fungus or dust?

Things on the back of a lens can cast shadows, but they have to be pretty big before they're noticeable. To see just how big, please take a look at Roger Cicala's lensrentals.com blog entry: The ...
Michael C's user avatar
  • 175k
3 votes
Accepted

How do I remove dust and fine hair artifacts in my photos?

I would be even more concerned to find out what is causing that streak. If this is a crop from even larger image, I would suspect there is some dust on the sensor or inside the lens. However, I also ...
Sami Serola's user avatar
3 votes

Will clay and wood dust affect my camera?

Yes. This kind of dust is pervasive and will get where you don't want it. The underwater housing is a good idea — or if that's too expensive, a ziplock bag, some tape, and careful checking of all the ...
mattdm's user avatar
  • 143k
3 votes

What are these branching, dust-like particles? How to prevent their spread?

This, as oaaya already noted, indeed seems to be fungus. The second abnormal thing that I see on the photo is the dark brown coloration of the retaining ring around one of the lens elements - this ...
Inquisitive_Torquemada's user avatar
3 votes
Accepted

Lens getting fungus again and again

The best way to inhibit the growth of fungi in lenses that have already been infested and cleaned is to periodically expose the internal lens elements to UV radiation. This can be as simple as ...
Michael C's user avatar
  • 175k
3 votes

Dust inside lens result incomplete images

Dust in your lens (especially towards the front side) will likely not produce a dark spot in your image. This is more due to dust specks on the sensor, that come and go (your camera likely cleans the ...
xenoid's user avatar
  • 20.6k
3 votes
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What is this speck in my camera?

Not to worry, the speck is the shadow of a bit of dust on the protective cover glass that hovers over the digital image sensor. Digital cameras that allow lens removal and replacement exposure the ...
Alan Marcus's user avatar
  • 38.7k
2 votes

Speck on view finder or sensor

When you look through the viewfinder you are looking through a focusing screen, a mirror and out the lens. The sensor is covered by the shutter and mirror. So any speck you see through the ...
MikeW's user avatar
  • 33.3k
2 votes

Why are there black dots on all photos taken with Sony phone?

I suspect small clusters of sensels are dying off. This could happen if the sensor were damaged by lasers. Or perhaps the phone was dropped too many times and some internal connection was damaged. ...
xiota's user avatar
  • 26.9k
2 votes

How do I remove dust and fine hair artifacts in my photos?

I think the two simplest options in PS would be: Select the area with the lasso, then right click and fill with content aware. Use the patch tool (found along with the healing brush). Select the ...
Robin's user avatar
  • 1,582
2 votes

Dust spot or scratch?

Don't worry! It's dust on the image senor cover glass, easily removed. The cover glass hovers above the surface of the senor so what you are seeing is the shadow of a bit of lint. The shadow is ...
Alan Marcus's user avatar
  • 38.7k
2 votes

Focus motor problem in lens due to fine dust particles

No, there is nothing you can do yourself. This is one of those cases of, "if you have to ask, then you don't know enough about it to do it yourself". The lens needs to be sent to Sigma (or a Sigma ...
scottbb's user avatar
  • 32.3k

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