Photography

Questions tagged [iso-noise]

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Noise that is made apparent by increasing the ISO setting. This noise is primarily random "photon shot" noise, and usually has little to do with the electronics of the camera.

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If you double ISO and halve shutter duration, how would it affect SNR?

Assuming the SNR is shot limited. Would it be the square root of 2 because of the shutter speed?
Manny
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2 votes
1 answer
451 views

What is read noise?

I recently upgraded from a Nikon D750 to a Nikon Z6 II and came across this graph plotting the read noise (Y axis) against the ISO setting (X axis) of both cameras: As you can see, there is a big ...
Jaap Joris Vens
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3 votes
7 answers
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Does Manual iso = low noise?

I was taking some test shots today indoors (decent amount of light) set the iso manually to 800 looked through the viewfinder and I was at 1/20 (I was using Av mode) bumped the iso to like 1000 and my ...
Joe B
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2 answers
351 views

I am shooting video at 200 ISO but the video is still really noisy. Any ideas on how to fix this?

I'm using a Sony Alpha A58 and I am shooting at 25 fps. My settings are ISO 200, F5.6, 1/50. The video is noisy in general but more in the darker areas such as black wall e.t.c. Any ideas? Thanks!
Joseph Riley
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1 vote
2 answers
114 views

Very noisy image, looks like stars

Yesterday I did some long exposure shots, and it turned out to go quite well (in my opinion), just one issue is that the image is very noisy like I've never seen before. The noise looks like stars, ...
Dadahu
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0 votes
2 answers
199 views

What is "noise" at higher iso at smaller sensors and why is it less problematic on larger sensors [duplicate]

After watching many m43 camera reviews,almost every reviewer say's that how there are "huge amounts of noise" at higher iso's, So I am curious, what is "noise" why does it increase ...
Someone Unknown
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12 votes
9 answers
4k views

How much ISO noise is removable in post?

I was experimenting by taking photos of the moon using an 1000mm MTO-11ca lens and thought I should get even closer by adding a teleconverter (Kenko Pro 300 3x). The picture quality is not sharp at ...
lijat
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2 votes
3 answers
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Why are all indoor pictures with my camera grainy?

I'm a beginner who just bought a Panasonic Lumix DC-FZ82 and expected better results than on my iPhone. I've consumed a bunch of how-to's and understand the basics of f-stops, ISO, shutter speed, etc....
Tom
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2 votes
6 answers
2k views

What is the physical cause of increasing noise at high ISO?

Which is the physical cause of the increasing noise at high iso? I know that Iso represents the sensor/film sensitivity to light: at lower iso we need an higher exposure time to get the image of the ...
Kinka-Byo
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0 votes
1 answer
92 views

Is the following video explaining ISO accurate? [duplicate]

So, I was searching for the exact mechanism behind the workings of ISO (or film speed) in digital camera. I found this video and it was pretty simple. But i was wondering if this video is accurate and ...
Zinc
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2 votes
1 answer
971 views

How to reproduce camera noise reduction using open source software?

I have unsuccessfully tried to reproduce the camera's (Canon EOS 2000D) noise reduction algorithms using open source software when post-processing RAW (.CR2) files. Specifically, the camera's noise ...
juhist
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1 vote
1 answer
243 views

Why is same image exposed at 100 ISO noisier than 3200 ISO? [duplicate]

I used to believe that ISO adds noise as a drawback to increasing exposure, but after researching the topic I arrived at the conclusion that it is a misconception. By amplifying the existing signal ...
Dwarf Vader
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5 votes
2 answers
277 views

dB ratings for sensor SNR, what do they specify exactly?

I find the use of dB values to specify sensor properties confusing.. A rating of 20dB SNR at a given ISO setting could mean, assuming a reasonably linear system: RMS noise voltage and thus luminance ...
rackandboneman
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4 votes
1 answer
200 views

Doubling ISO vs summing pixel values from 2 shots - different?

How much different is doubling the ISO vs. summing the pixel values from 2 shots? (at a very basic level, ignoring fancy image processing, image compression, etc) When taking a shot of the night sky (...
Benjamin H
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2 votes
2 answers
156 views

ISO to shoot very very dark object with a tripod [duplicate]

I want to take a picture of a (almost) pitch black landscape at night. Like a mountain or trees at night. The object will not be moving and I will have a tripod. I am not sure what is the best way to ...
Scorb
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1 vote
0 answers
265 views

How can I best post-process underexposed, noisy images taken at 5000 iso?

I'm editing photos but the photographer was quite new and he took photos using Olympus OMD EM5II at 1/400, ISO 5000 and at f3.5 resulting in a underexposed noisy image. (The photos are raw.) I tried ...
Jan Paul Fernandez
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3 votes
1 answer
2k views

Are there Lightroom plugins for noise reduction which work on RAW data?

I'm wondering if there's any plugin or 3rd party software for Lightroom which lets me reduce noise on RAW image data directly? I'm currently using Define2 from Nik Collection for Lightroom but it ...
Mohd akhtar
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0 votes
7 answers
2k views

Why am I getting a lot of noise at 1000iso when my camera says it can go up to 6400?

My Nikon D7100 is getting a lot of noise when I bump up the ISO to even 1000. How do I reduce that? It says it can go up to 6400 which is one of the reasons I got the camera.
Taylor Wilson
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2 votes
2 answers
272 views

How close are we to the theoretic limits of sensor low-light performance?

Consider a low-light, high-ISO, short-exposure shot. We all know the image will be noisy. I understand that the image noise is dominated by the photon counting noise (shot noise) that is caused by ...
anrieff
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6 votes
2 answers
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Does changing the ISO of a modern digital camera really change the gain of an electronic amplifier?

The question Why would using higher ISO and faster shutter speed yield more noise than using lower ISO and slower shutter speed? currently has five answers, and four of them contain the word amplify ...
uhoh
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1 vote
7 answers
655 views

How do I know which combination of aperture and shutter speed yields enough light to have pictures with minimal noise?

This is a kind of continuation of this question. I'm shooting a poorly lit object. Camera has fastest ISO value of 3200. I set aperture to some specific value and don't alter it, the object is ...
sharptooth
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10 votes
6 answers
6k views

Why would using higher ISO and faster shutter speed yield more noise than using lower ISO and slower shutter speed?

I'm trying to see how this answer correlates with practice. That answer basically says I need to let enough light into the camera and then use the highest ISO value and I'll get the lowest noise then. ...
sharptooth
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2 votes
2 answers
2k views

Best way to remove the red tint in shadows astrophotography

Recently I took a picture of the milky way from inside a cave. I've processed everything how I wanted and it looks great on the web but now I need to print a large version of it (610mm x 900mm). ...
Dale Gribble
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4 votes
2 answers
331 views

How do Nikon full-frame handle ISO noise, especially at ISOs other than full-stop increments?

After reading this question and its answers, I came to wonder if Nikon full-frames handle ISO more or less in the same way as Canon does. Quoting an answer of this question: The native ISO for ...
Noldor130884
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14 votes
5 answers
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Lots of noise in my hockey pictures. What am I doing wrong?

I often take pictures of hockey players but they have a lot of noise and look very bad. I guess my lens doesn't have a big enough aperture, but I'd like to know what I could do to take better shots. I ...
mimipc
  • 243
5 votes
1 answer
741 views

How to create a denoising profile for darktable

I tried to create a denoising profile for my Google Nexus-5 smartphone as described in a blog post. I shot some pictures, one per ISO setting (100,200,400,800,1600,3200) with OpenCamera which are ...
Kurztipp
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0 votes
1 answer
2k views

Expanded (low) ISO on Nikon D810

I'd like to know where I can check if my Nikon D810 introduces more or less noise from using the expanded "Lo" ISO setting: ISO 32. There's already the topic Should I use low-end expanded ISO? on ...
user55789
  • 205
3 votes
3 answers
1k views

What matters for low light performance?

I really enjoy taking pictures at night, however my current point and shoot is not quite cutting it, so I'm looking to step up to a DSLR. I've mostly been looking at Canon's Rebel line and have read ...
James
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5 votes
4 answers
2k views

Is there any point in ultra-high ISO for DSLR [not film]? [duplicate]

This isn't a moan - though it easily could be - but is there any real practical use for the high ISO capabilities of modern DSLRs? Some background, as this is my first question here - I'm very new to ...
Tetsujin
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0 votes
1 answer
235 views

Finding the best balance between ISO and exposure

I once wondered, in low light would it be better to shoot underexposed pictures with a low ISO and raise the exposure in post, or to shoot a properly exposed picture with high ISO? The answer to this ...
Ryan
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2 votes
2 answers
159 views

Noise & Blue Speck in A Priority Nikon D5200

So, I took this shot indoors (bright sunny outside) using on a Nikon D5200 with A priority and Auto ISO: Photo looks ok when zoomed out. But when I zoom 1:1 in LightRoom, I see some blue specks in ...
Code Poet
  • 135
4 votes
2 answers
3k views

How can I measure noise from the photo?

With higher ISO comes "bigger" noise. Is there a way to measure how much noise does the photo have? Maybe some programs can calculate it?
Piipsy
  • 491
1 vote
1 answer
831 views

What's the relationship between chromatic aberration, ISO and long-exposure noise reduction?

I took a photo that has what seems like chromatic aberration. It's a purple color at the left and bottom edges, especially at the bottom-left corner: This is a 30-second exposure at ISO 3200 with the ...
Kartick Vaddadi
  • 4,726
0 votes
2 answers
1k views

Astrophotography exposure setting for noise reduction

I was on a hiking for a week into the dense forest of Western Ghats with my Sony slt a58. I am into Astrophotography. The place was absolute black with millions of stars. The perfect place for ...
Suresh Karia
  • 101
3 votes
2 answers
126 views

What's worse for post-processing blurriness, graininess or softness?

Context Using an a6000, I've been learning a lot about photography and how to control the depth of field (by changing the aperture), blurriness (by changing the shutter speed), and the noise floor/...
unsignedzero
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1 vote
2 answers
322 views

In my Canon t5, how much can I bring up the ISO without getting unacceptable noise? [closed]

Would you feel comfortable at 3200? Or maybe at 1600?
Emilios1995
  • 113
3 votes
1 answer
1k views

Better tools/techniques to merge multiple high-ISO images for noise reduction?

Using Photoshop, I can take a burst of nearly identical exposures, "stack" them automatically aligning, and use the median stacking mode. This reduces shot noise and is something approximating a ...
JDługosz
  • 4,362
2 votes
1 answer
126 views

Why are there shiny bits in my night photo?

Fisheye lens, so no UV filter installed that can mirror it. ISO 800, 10s shutter, Canon 40D my guess is in-camera high ISO reduction algorithm gone awry. could be? Edit: I was talking about the bits ...
PIXP
  • 251
3 votes
4 answers
9k views

Sony a7: Is there more noise for ISO <100?

I have a Sony a7 (original). And on the camera it has a feature my old Canon DSLRs never had: it allows me to select ISO values LOWER than 100. I understand the point of these lower ISO values: I ...
john_science
  • 581
5 votes
4 answers
1k views

Does any software do denoising on Raw files before demosaicing?

Part of a combined effort for "social" and "spontaneous" photography is to use a compact mirrorless camera and available light. I've looked at a few tools for noise reduction including Neat Images ...
JDługosz
  • 4,362
1 vote
3 answers
587 views

How can I better take indoor photographs with wide aperture and low light?

Recently I photographed an event for a friend as a favour using my Canon 750D, my 18-55mm stock and the 50mm f/1.8. The event was indoors, followed briefly by outdoors and then back indoors in a ...
Richard
  • 457
0 votes
1 answer
98 views

In what kinds of images would high noise be most manageable?

In what sort of photographs does the noise least detract from the image? (The noise is that resulting from use of high ISO settings.)
user75798
  • 121
1 vote
3 answers
2k views

Too much "Grain" in photos [duplicate]

i'm trying to produce a few mockup pictures of a person using a tablet around the house. These are the conditions: Camera Nikon D90, Lens 18-55 The pictures were taken in the morning Indoors but the ...
user2093301
  • 123
6 votes
2 answers
33k views

What is the Base ISO of a Canon 5D MK III?

Can anyone tell me what the base ISO is of a Canon 5D MK III? I was reading this great piece on ETTR (1) and (2) and it repeatedly mentions how important shooting at Base ISO is when using ETTR. I ...
Undistraction
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20 votes
5 answers
2k views

Might future advances in sensor technology reduce or eliminate noise?

Is there a possibility that future tech advances may reduce or eliminate the noise when using high ISO setting, or is this noise unavoidable and inherent to all digital sensors? If there is a ...
angel rojas
  • 1,141
6 votes
2 answers
400 views

Why does raising ISO make image quality appear lower even though my measurements suggest it shouldn't?

I know this may be rehashing one of the most discussed topics, but I would like to take it a slightly different direction and solicit input. First of all, I am familiar with the electrical ...
Jon
  • 407
7 votes
2 answers
856 views

Do low ISO photographs need Long Exposure Noise Reduction?

I usually took long exposure photo with ISO 100, so do I really need to turn on Long Exposure NR on? It really take time for processing.
James
  • 173
1 vote
2 answers
4k views

Noise in JPEG file after processing RAW file in photoshop

Recently i started shooting in RAW after understanding its advantages over JPEG format. While processing the RAW file there is an option to reduce noise in a captured picture. It works great when i ...
Mandar Patil
  • 291
4 votes
1 answer
964 views

How to denoise a dark photo with extremely high ISO?

There are situations where I would reluctantly have to turn the ISO to the larger extreme. Nevertheless I can get some photos that I pretty much like under these circumstances. Here is an example. (...
SolessChong
  • 153
1 vote
5 answers
9k views

What's a good software to combine all the frames in a video into a photo?

The goal is to reduce noise. This is on my iPhone 5s, which has bad low-light performance, as you can imagine. So I wanted to see if I could take a video (without the phone moving), and then merge ...
Kartick Vaddadi
  • 4,726

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