Questions tagged [artifacts]

Elements of a photograph that are generally undesirable or have a negative impact. Examples include noise, flare, dead or hot pixels, sensor "spots", reflections inside the camera/lens system, etc.

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What is causing these horizontal lines on developed photos (35mm)?

I recently started using my friend's mom's old Canon 35mm film camera. I was a bit annoyed when having the film developed by a lab, and copied to standard photo paper - there is a single horizontal ...
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1 vote
5 answers
2k views

What is causing the "bright spot" artifact in my picture?

Why is there an artifact in top edge of my picture? Camera: GH4 Lens: 20mm Lumix G 1.7 Shutter speed: 15 sec ISO 100 f/16 Is this something in my sensor? There are two black dots visible under the ...
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3 votes
1 answer
203 views

Detect Google "stylized" photo?

Google on Pixel phone stylizes some photos. Selection of photos to stylize is arbitrary (happens to some photos when you upload, no user selection to trigger) and what exactly happens in stylizing is ...
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  • 131
1 vote
2 answers
176 views

What is this golden streak artifact in this photo?

This was taken at 1/500sec, iso64, f/2.8, 122mm focal length. Nikon D850, 70-200mm lens. At first I thought it was her hair, but it seems to be very reflective and moving very fast: At 100% It even ...
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  • 954
2 votes
1 answer
140 views

Why am I getting occasional cloud-like artifacts on my 4x5 film shots?

Not always, just from time to time, I'm discovering these cloud-like artifacts on my 4x5 film shots. They are present on the film itself; it's not scanning artifacts. Artifacts can be present on ...
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1 vote
1 answer
98 views

plug n play camera compatible with a projector

I am working on a project where I have a projector and a camera working together. The camera will record what a person does in front of a projector. Ideally the camera would also record what the ...
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1 vote
3 answers
536 views

What is the name of this distortion or artifact?

What is the name of this distortion or artifact? This is usually found in smartphone cameras, Nikon and Sony point-and-shoot cameras. This is not found in Canon point-and-shoot cameras, in Canon point-...
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0 votes
1 answer
113 views

Image artefacts when exporting RAW to JPEG [duplicate]

I have a bunch of pictures in RAW format (.CR2) taken with a Canon EOS 1100D. When I view these files using Windows Photos app the images look great, however when exporting to JPEG using RawTherapee ...
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1 vote
1 answer
117 views

What causes the frosted glass effect of out-of-focus areas?

I expect that the out-of-focus areas would look like smooth gaussian blur ideally. But I found that they look like looking through frosted glass. Colors around the edges are blending with a grainy ...
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  • 111
3 votes
1 answer
247 views

What are these curved, dark bands at the top of my photo?

I've had these on two different rolls of film on two different cameras now. It's not a scanning issue, because the bands are visible in the negative when inspected. It's only visible against the sky, ...
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  • 243
2 votes
1 answer
229 views

What could cause these spots on my scanned negatives?

I just had 4 rolls of film processed and scanned, and have been emailed the scans but have not seen the actual negatives yet. The first thing I noticed is some spots in exactly the same location on ...
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  • 1,617
2 votes
3 answers
261 views

What are these light circles over my photos?

I got a Voigtländer Vito BL recently. I tried it, and noticed that some of the photos came out with a big light circle right in the middle. I have tried searching for circles, stains, orbs, etc., but ...
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12 votes
4 answers
394 views

multi-strobe-like motion blur outdoors?

This photo (cropped here) appears on p. 48 of the October 2020 issue of the Experimental Aircraft Association's Sport Aviation magazine. The upper blade of the propeller shows the motion blur that is ...
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1 vote
1 answer
491 views

What are these lines in photos when viewed zoomed in on iPhone?

I take photos on my Canon (It happens on both my Canon EOS Rebel t1i and my Canon EOS R) camera then download them onto my iPhone. Then when I zoom in close enough, there are these invisible lines on ...
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6 votes
2 answers
534 views

Why am I sometimes having "doubled image" and soft photos with my Tamron 100-400mm

I sometimes get unsharp results out of my Tamron 100-400mm F/4.5-6.3 Di VC USD, with a "doubled image effect", especially visible in the out-of-focus area (bokeh). But the rest of the time, ...
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4 votes
1 answer
535 views

35mm Black and White Film Artifacts

I have recently begun shooting photographs using black and white film ( Ilford ISO 50 ). My camera is a Pentax ME with automatic exposure controls and manual focus. My most recent developed photos ...
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1 vote
1 answer
187 views

What's the problem causing this ring-shaped artifact in my image even though I have cleaned my lens?

I can't see any physical problems on my lens, and sufficiently cleaned it, but see a ring shape in my footage such as... I only have one lens so can't check if it's the camera or lens Any tips or ...
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0 votes
1 answer
312 views

What causes these vertical dark bands? [duplicate]

What could explain the dark bands seen in these pictures? This photo was taken at the Harvard Museum of Natural History, using a Pixel phone. The picture is shot looking through a glass panel into a ...
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0 votes
1 answer
124 views

What causes these (constant) black stray lines on my photos? [duplicate]

There are black lines on my Nikon D3100 and I'm wondering if it is a problem with the lens or with the body itself.
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5 votes
1 answer
236 views

Some darktable modules create hot pixel "sparkles". Is this a bug, or am I using it wrong?

I'm just getting started with Darktable 3.0.0 processing some RAW files out of my Canon 6D MkII. One odd thing I noticed is that some of the modules seem to create hot pixel-like "sparkle" artifacts ...
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  • 163
1 vote
1 answer
267 views

Green dot in center of photo

When I have to take a photo with smaller aperture and zoom I always get a weird green dot in the center of the image. Please, advice what causes this artifact and a proper way to avoid or fix it. --- ...
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  • 111
5 votes
3 answers
2k views

Solve unwanted white "waves" and "Pacman squares" in low-light picture - post using Google Photos

After op commented that my picture is super under-exposed, I tried post using Google Photos. But when I increased the exposure, I saw some unwanted white "waves" or rows in the photo. The edges of ...
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7 votes
2 answers
514 views

What is the difference between Diffraction Spikes and Lens Flare?

When Googling for lens flare, one often finds images that also include stars (rays / diffraction spikes), like this: What is the difference between diffraction spikes and lens flare and are the two ...
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11 votes
3 answers
5k views

How do I take a photo so the moon doesn't have bright "rays"?

Any advice on how to remove moon "rays"? (Looking to learn how to take a photo without them, not remove them in post) Artistic opinion - is it too underexposed? The picture was shot at shutter speed ...
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1 vote
2 answers
231 views

What would cause just one photo from my phone camera to have large, blotchy magenta areas?

What would cause the pink on this picture? All the pics before and after were normal. No filter, no flash.
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3 votes
1 answer
750 views

What would cause these white straight but slightly squiggly lines?

I'm using a Holga 120n camera. I look this photo in my garage with my camera stabilized on a table. I noticed two streaks on the photos after developing it. This is the only photo on the reel with ...
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1 vote
1 answer
184 views

What explains a lens flare "streak" on only one side of light source?

We know than an axial streak can be caused by a smudged lens that has been wiped in one direction. The following image shows both lens flare and a lens "streak." But what could explain the one-sided ...
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  • 3,503
1 vote
2 answers
119 views

Are these soft blotches caused by dirt on the sensor?

Can someone tell me if this is dirt on my image sensor? They show up in the same place in other images. This photo is a bit clearer — taken at f22 manual focus at the sky and in the exacly same ...
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5 votes
5 answers
2k views

What caused these large white spots on my developed negatives?

I've shoot some Ilford HP5 + on a Mamiya 645 1000s for the first time. I developed the film with Ilford DD-X (1 + 4), ilford stopbath and fixer on a Paterson tank. After scanning the negatives i ...
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  • 115
1 vote
1 answer
232 views

When zoomed in, I see red, blue and white pixels. What is the cause of this? [duplicate]

I was experimenting with the bulb mode of my Canon EOS 600D camera. I realised, in the image there were these red, blue and white pixels that are also seen in the screenshot. What is the reason that I ...
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3 votes
2 answers
613 views

What causes this bloom with an old telephoto lens?

I recently got a Görlitz-Meyer Optik Telemegor 250mm F5.5 I am using this telephoto-lens on my Sony a6300 APS-C camera and I like it. The problem I currently have is, that I get a lot of "bloom" in ...
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0 votes
2 answers
213 views

Is it just me, or do smartphone cameras not have any chromatic aberations at all?

To this day I have failed to spot any color artifacts in smartphone photos. Either Nokia N8 phone on a camera or my old Vibe P1 Turbo and even the G7102 I have (Which has glare towards the edges) Is ...
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0 votes
1 answer
104 views

Where does this yellowish shadow artefact come from?

I only notice this yellow shade after creating a HDR (Near the top of the building in the foreground. The image in this question is cropped from the oirginal) I didn't notice before because HDR makes ...
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0 votes
2 answers
230 views

Is it possible to get green and red chromatic aberration?

In one of the hallucinating scenes in a video I have played. The vision is blurry and objects nearer the edges of the screen are green and red Now the usual chromatic aberration patterns are purple/...
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7 votes
4 answers
257 views

Is this long-exposure artifact a sensor defect or light leak?

I am shooting on the Nikon D800. I suspect it has a sensor defect because there is a very uniform artifact, in my images. It looks unlike a light leak as it's always in the same position and has the ...
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  • 1,095
2 votes
2 answers
510 views

Why are there weird red spots and blobs on images taken with Yashica Super FX-3?

I have been getting some weird reddish dots and blobs in most of my shots with my old Yashica Super FX-3. They seem to appear with any lens and using film rolls with different ISOs (200/400), and also ...
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1 vote
3 answers
307 views

What is the maze-like pattern in a magnified full-size review of my image?

I'm making an edit in Lightroom. Can anyone tell me what this pattern is? And also how to get rid of it.
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-1 votes
3 answers
336 views

What can cause a horizontally flipped ghost image when using a monochrome line-scan camera?

What can cause a horizontally flipped detailed ghost image in a monochrome line scan camera? I am new to photography but I have been seeing horizontal reflections in pictures with bright objects. I ...
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-1 votes
3 answers
145 views

Damaged coating tamron 18-200mm?

I just bought a secondhand 18-200 tamron lens but I can't seem to get a fully sharp picture. I know my settings and the picture is "smudged" blurry and seems to have some color artifacts on one side ...
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2 votes
1 answer
123 views

Why does this ugly line pattern appear when I upload my full-sized image to a website or view on mobile?

I have 5760×3840 size JPEG image and when I upload it to a website or try to view on mobile, some kind of line things seem to be going on it. It looks ugly. I tried to resize the image to 1200X800 and ...
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9 votes
4 answers
20k views

How to edit photograph to remove flashes of light / glow / glare?

How can I remove the "glare" on the musicians in the photo below using Photoshop? I do not have the relevant vocabulary to express what this "glare" really should be called. I am not a photographer ...
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0 votes
1 answer
209 views

Why does purple lines appear in CCD?

I know CCD scans the array line by line and over voltage from even a single pixel can wreck the whole line. But why are these wrecked lines colored magenta?
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3 votes
1 answer
302 views

What is this RGB artifact and how did it form?

I took this with my Nikon DSLR about a month ago. Today I was going through the photos and was just about to delete this otherwise unremarkable picture when I noticed a large artifact over the image ...
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  • 233
3 votes
1 answer
136 views

What is this streaky Cyanotype artifact?

So I made some cyanotype prints for the first time. So much fun !!! :D However I seemed to be getting some artifacts in my highlights See around the ship: Original to compare: So after ...
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1 vote
0 answers
125 views

What are the underlying causes of artifacts seen with anamorphic lenses?

When a camera with an anamorphic lens shows some artifacts, they are usually either an oval bokeh (vertical) or a lens-flare steak (horizontal). How much of these artifacts are due to the "anamorphic ...
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  • 111
2 votes
3 answers
193 views

Possible cause for corrupted images (colored stripe with dots in pictures)?

I've noticed the below artifact/data corruption (colored stripe with dots) in a small handful of my photos, and I'm trying to figure out the cause. Is it the camera (Nikon d90)? Could it be the SD ...
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  • 121
5 votes
1 answer
577 views

Why is the bottom of this image over-exposed?

I am getting a lighter edge on the bottom of my images... I have googled and can't seem to find anything that points me in the right direction to the cause. Any ideas? Info: Canon 6d OrLit ...
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7 votes
3 answers
419 views

What caused the strange "wave X" lines in the out of focus background area in this photo?

Can anyone explain these wavy lines forming a across in the photo? I used a Nikon AF-S DX 18-140mm 3.5-5.6G ED VR at 140mm, ISO was set to 160. Here is a 1:1 pixel crop:
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5 votes
2 answers
396 views

What is this odd brushstroke-like blur with my Canon EF 100-400mm f/4.5-5.6 L IS II?

I am shooting a lot of low light sports up in the north and I have noticed a lot of back focusing issues that I mostly blamed on myself with a 5D Mark IV and EF 100-400mm f/4.5-5.6 L IS II. But ...
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2 votes
1 answer
169 views

Weird orange artifacts in smartphone image of a white light source [duplicate]

In my work (lab research), I have need to take digital photos of thin transparent gels sitting on and being illuminated by a white light box. When I try to take a digital photo, weird orange bands ...
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