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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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2
votes
0answers
46 views

Time-varying artifacts in long exposure: is it the sensor?

I have just made my first attempt to photograph the International Space Station, and I clearly need to improve my technique. Here are the details: Body: Canon EOS-M (1) Lens: EF-M 55-200mm at 200m, ...
0
votes
2answers
789 views

What is causing the bright flare on all of my images?

My new camera Canon 6D show this lensflare (raw or jpeg) in all the photos with this lens (Canon 50mm 1.8) or with the Samyang 16mm 2.8 (which I returned for judging what was defective). The lensflare ...
4
votes
2answers
669 views

How can I eliminate white glow/halos surrounding bright objects?

I recently took this picture and was frustrated by the white glow coming from the man's shirt. I realize it's a high contrast scene, but I don't understand the science behind why the shirt appears to ...
5
votes
1answer
386 views

What might cause horizontal artifacts in Lightroom after import?

I have some old photos on the SD card in my Sony A57. After importing into Lightroom, there are horizontal artifacts on most of the imported photos. This is a screen grab of Lightroom displaying one ...
2
votes
1answer
78 views

What are these streaks in negative scans I got back from a lab?

I'm a beginner that's getting back into film photography after many years. I just received scans of my negatives and noticed some of them have streaking while others do not. I feel like this may have ...
3
votes
1answer
2k views

What could cause this white speck in a blue sky?

I took a photo during blue hour, and notice that there are some strange white speck on the blue sky. What is this and why it happens? Initially I thought it was dust, but usually dust will leave black ...
5
votes
1answer
168 views

Why am I am seeing rings (banding) instead of smooth graduation in my sunrise pictures?

Below is a screen capture crop from Potoshop of an unaltered raw photo from my full frame Canon 6D taken with the new Canon 16-35 f4 L at 16mm, ISO 100, f22. I am seeing rings where I am expecting a ...
2
votes
1answer
167 views

What is the cause of black bars on a photo of AMOLED display?

What is the cause of those black bars on the picture? Their orientation changes by moving the camera. The display is of a Samsung Galaxy S3 (i9300), an AMOLED display, set to minimum brightness, ...
1
vote
1answer
85 views

Can I fix the large pink mark which appears on all photos with light background from my Canon Powershot ELPH?

I have a Canon Powershot ELPH 300 HS. See the large pink smudge across the left? Is this a problem I can fix by cleaning the lenses and image sensor, or is this camera/sensor a dud?
3
votes
3answers
265 views

How can one correct intensity flicker due to AC line frequency?

Is there a good image processing method to get rid of the horizontal stripes in the images taken under fluorescent lighting? These stripes (flicker) occur when you take pictures indoors due to the 50 ...
3
votes
1answer
169 views

What causes this weird angled glowing blur around lights on my low light shots?

I've been trying to figure out why this is happening for a few weeks. When I take pictures, usually during evening times when the sun starts to set and the street lights come on, I see this weird ...
1
vote
1answer
282 views

Why do I get dark horizontal lines (stripes or bands) in bad lighting with my Fuji X-T1?

Can anyone explain why I get those lines when taking photos in a bad/weak lightning ? I attached some photos.
1
vote
5answers
3k views

How to remove white spots from a scanned picture?

I have a photo and I scanned it, but the scanned version introduced a lot of white spots on the image. I think the problem is the type of paper of the photo, which is not smooth a bit rough. There's ...
0
votes
1answer
134 views

What is this yellow mark I get on dark photos?

I'm using a Nikon D3200 - new to photography. Whenever I take photos of the night I always get this yellow mark in the same spot. I thought it could be a dirty lens so I cleaned it with a microfiber ...
1
vote
2answers
112 views

Is the weird red and yellow patch near the center of my photo chromatic aberration?

I found this weird red and yellow thing in this shot taken using an EOS Rebel 1200D and the lens that came with it. It looks surprisingly good; how can I control and replicate these effects?
2
votes
0answers
86 views

How much flare should I expect with a Hoya HMC Filter?

After I did some review comparison (especially this one) I bought a 67mm Hoya HMC filter. Then I took some comparison pictures. Do you think the flare is within the acceptable range?
1
vote
2answers
125 views

Lines through my images - help

I have a recently purchased Nikon 5100. Since purchase there is a series of two lines (in the same place) in the frame that show up on the pictures. Any guesses as to what they are and how I can get ...
12
votes
6answers
1k views

How can I avoid green flare on my sunrise photos?

I took a series of sunrise photos. Once the sun actually came above the horizon, the brighter the sun became the more apparent and brighter a green flare (glare?) appeared. How can I avoid that? ...
7
votes
3answers
1k views

What causes these green dots in my image?

I just received a 35mm f/1.8 DX lens for my Nikon D50 for Christmas, and took some shots where the lights on the tree were the main source of illumination. Almost all of them exhibit very prominent ...
0
votes
1answer
124 views

what are these strange artifacts on this photo? [duplicate]

what are these strange artifacts on this photo? how to avoid them? photo is shot with canon 1200d 50mm f1.8 4seconds shutter thank you
1
vote
1answer
138 views

How to remove unwanted colors in picture? [duplicate]

I took product photos for my company and am currently editing them. However, some of the white parts of the shirt look a little odd zoomed out. When I zoom in, I see the following: I'd like to ...
1
vote
1answer
205 views

Why are there white outlines around the subject in this photo when zoomed in?

Please give me a solution to this if possible. Image showing white outlines when zoomed. Crop: Zoomed:
0
votes
2answers
95 views

Can a ghostlike image be caused by a overlap with previous frame on an SD card?

Is it possible for a secure digital card to have a ghostlike image on a different frame, ff you shoot digital cards and do not reformat them? Could a ghost image appear from a previous frame number if ...
6
votes
2answers
602 views

Why does this satellite image of an airplane in motion show red, green, and blue bands with strange artifacts?

I stumbled upon this satellite image (http://goo.gl/Wv503u) capturing a plane in flight over a city. I'm having a little trouble explaining the color effects caused by the aircraft motion. What I ...
26
votes
6answers
5k views

Why do photos of digital screens turn out the way they do? [duplicate]

When I take pictures of a screen at school or at my house, they turn out really weirdly. When blown up to 100%, they look fine, but when they get sized down, they look really weird, here is a ...
3
votes
1answer
340 views

Is there a name for artifacts for taking a photo of LCD / LED screens and how to remove or avoid it? [duplicate]

The following is a photo of a game console 3DS, although the 3D is turned off: There is "fish nest" artifacts, and sometimes the lines even curve on some photos. iPhotos on a Mac seems to try to ...
1
vote
3answers
109 views

What could have caused this splotch to appear?

amature photographer here. I recently took some photos of the area nearby where I am staying, and one of them caught my attention when going through them afterwards: Notice that gray splotch at the ...
23
votes
2answers
2k views

What is noise in a digital photograph?

What kinds of effects are present in digital images that are referred to as "noise"? What are the different sources of noise? What causes each type of noise? What are the characteristics of the ...
3
votes
0answers
143 views

Why is there a grid pattern of darker pixels in this twilight sky flat field? [closed]

This is the first time that I'm really inspecting the calibration images we were taught to take/use during data reduction, and I've noticed something in all the flat fields. The image below clearly ...
3
votes
2answers
1k views

What causes longitudinal chromatic aberration on Nikon 50mm f/1.4D?

I have looked on my new 50mm lens photo (I have Nikon D90) and I see "purple fringing" around the unfocused objects (longitudinal chromatic aberration). What's is going on? Is it common for this lens ...
3
votes
2answers
163 views

Are these weirdly-shaped purple stains really from particles under the first layer of the sensor, and if so, what can I do about it?

I have those little particles on my pictures. There are a lot of them, as you can see, and they have different weird shapes: I already sent my camera for a sensor cleaning and the guys at the shop ...
17
votes
2answers
890 views

Why do I see this yellow color shift at high ISOs and fast shutter speeds? [duplicate]

I recently purchased a full-frame DSLR with a reported highest ISO of 204,800. I’m intrigued by the possibilities of the high ISO range and how far Lightroom and Aperture (I use each of them) can ...
2
votes
3answers
621 views

What is the blue circle in this moon image?

Using my Nikon D3200, I tried to capture an photo of the moon using the 18-55mm kit lens. I can see a faint blueish circle, even in my view finder, and also in the final picture. Is this lens flare ...
3
votes
1answer
196 views

Why is the center of image smudged with magenta/white at a small aperture?

I took two pictures with a Nikon D300 and a 17-55mm f/2.8G lens. Both pictures have been taken at ISO 200, aperture f/22 and shutter speed 1/8s. I used a tripod. The only difference between the two ...
0
votes
0answers
566 views

Why do some of my RAW files get “broken”, with narrow solid black horizontal lines?

I shot a lot of photos during my summer vacation. Traveling during daytime, with little time to edit or review photos I often copied and erased my memory cards at nights so I could be ready for next ...
2
votes
1answer
615 views

What is causing this one line on all my photos from Nikon D3100?

Whenever I take a picture with my dslr, there is a strange line that shows up on the left of the picture all the time. Can this be fixed my myself, or do I have to send this one in?
2
votes
2answers
587 views

What is causing the strange lighter circles in images taken with my Canon 15-85?

I took these pictures with my Canon EF-S 15-85mm f/3.5-5.6 IS USM lens this morning: Would somebody please tell me that what is that white part in the lower right corner of the picture? EXIF info: ...
8
votes
1answer
2k views

is it normal to get significant lens flare with a 50mm f/1.8 Canon prime lens?

I've purchased a Canon EF 50mm f/1.8 II. But I'm really disappointed in the results, especially when using it for night photography. :( In my night shots a lot of lens flare appears in my photos. ...
12
votes
2answers
709 views

What causes and how can I avoid this moiré pattern in a composite night sky photograph?

I'm new to taking star trails, and fairly new to photography in general. After my first attempt at taking a star trail, I composited them in Photoshop and when I merged the layers I got this pattern ...
2
votes
2answers
437 views

Sony A7R Noise compared to Nikon D800/E Sample Explanation

I am looking for a high resolution camera for fine art prints and the Sony A7R seems great since it has the same Sensor res as the D800 in a smaller enclosure. For some reason when I look at sample ...
45
votes
4answers
46k views

What is moiré? How can we avoid it?

What is the image defect called "moiré"? What causes it, and how can we avoid or reduce it? Is it related to "false color"?
0
votes
4answers
152 views

Dark spots - sensor toast?

I can't seem to get rid of some very annoying dark spots that are very noticeable under certain lighting conditions. I've taken a test shot of my monitor showing a white background and amped up the ...
0
votes
1answer
167 views

What's causing the weird light pink color splotch in this photo?

Can someone tell me what is causing the splotch in this photo? It;s like a pinkish color right in the middle. The day was cloudy. Sun wasn't out. This is only seen in two of the pictures that I have. ...
2
votes
4answers
283 views

Are these strange splotches on buildings in a long-exposure photo hot pixels?

This is the first time I've seen this in my pictures and can't quite figure out what it is / how it fix it / or how to avoid it in the future. Was wondering if anyone here had any ideas? The thing in ...
1
vote
2answers
532 views

What's causing the “seeing double” lens ghosting in my photos?

I'm having a problem with my lens (Sigma 70-300mm f/4-5.6 APO) and this is what is happening sometimes: You can see the ghosts happen only by those red lines I've drawn, for example that metal ...
5
votes
4answers
402 views

What is the cause for this diffused artifact around the sun?

Last weekend, I tried shooting a wide-angle shot of a sunrise on the beach: You'll notice that there is a haze/artifact around the sun in an otherwise cloudless sky. What causes this? How can I ...
4
votes
2answers
368 views

What causes the dark halo around the copper part of the object in this photo?

I'm completely new to photography, and was attempting to shoot on a reflective surface (using a tablet for experimentation). I get some good results (to my untrained eye) but on my latest attempt, I ...
12
votes
7answers
6k views

Why does using flash sometimes create these white spots in the photo?

I have an Olympus FE-190. When I take a picture, with flash on Digital Image Stabilizer (DIS) mode, I get white spots in pictures. This doesn't happen always. There is only an option called Pixel ...
5
votes
3answers
439 views

What creates this strange flare and how to prevent it?

I shot at a concert for the first time. The pictures were pretty good for the capability of my equipment, but on some shots, the light has a very strange flare. It isn't the usual rays, but some soft, ...
12
votes
2answers
398 views

What causes faint circles in astrophotography images?

When processing an astro-images taken with a Canon 450D and prime focus, I often end up with a series of faint circles radiating outwards from an off centre point. What are they and how do I get rid ...