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Questions tagged [iso-noise]

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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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 ...
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1answer
121 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 ...
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2answers
75 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 ...
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2answers
122 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 (...
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2answers
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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 ...
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0answers
163 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 ...
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1answer
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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 ...
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961 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.
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208 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 ...
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2answers
451 views

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 ...
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7answers
379 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 ...
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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. ...
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2answers
1k 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). ...
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2answers
274 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 ...
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5answers
3k views

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 ...
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1answer
527 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 ...
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1answer
1k 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 ...
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3answers
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 ...
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4answers
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 ...
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1answer
153 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 ...
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2answers
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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 ...
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2answers
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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?
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1answer
379 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 ...
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2answers
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 ...
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2answers
103 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/...
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2answers
168 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?
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1answer
898 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 ...
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1answer
119 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 ...
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4answers
6k 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 ...
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4answers
814 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 ...
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3answers
513 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 ...
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1answer
95 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.)
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3answers
1k 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 ...
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2answers
25k 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 ...
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5answers
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 ...
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2answers
277 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 ...
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2answers
707 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.
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2answers
3k 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 ...
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1answer
570 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. (...
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5answers
5k 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 ...
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4answers
615 views

How much does noise reduction let me increase ISO without a visible decrease in quality?

When I take low-light photos with my Sony NEX-5R, I find that I stick to ISO 200 to ensure acceptable noise. I was told that fear of ISO will hold me back, and that I should do noise-reduction in ...
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1answer
557 views

How do I reduce noise in a sequence of photos of the same subject over time?

I'm making a timelapse sequence on my iPhone 5s. It looks good enough when it's bright outside, but when the sun sets, the video quality really suffers due to the poor low-light performance of the ...
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2answers
3k views

What is the precise definition of SNR, as used by DxOmark?

What is the precise definition of signal to noise ratio, as used by DxOmark? Please see here, after clicking Measurements, SNR 18% (it's not directly linkable). I am looking for an explanation (in ...
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3answers
316 views

Noise comparison for sensors the D800 vs the D600

If the main criteria of buying new FX camera for landscape photography is low sensor noise, what camera do you suggest to buy (Nikon): D800 ~2.5k, D600 ~1.7k. Does it make sense to pay extra money for ...
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4answers
21k views

Longer exposure & lower ISO or shorter exposure & higher ISO - what gives better results when photographing stars?

I've been dabbling with night landscapes and star photography with varying levels of success. I know I don't have the ideal lens (Canon 17-40mm f4 on a Canon 6D body) but I've seen some great shots ...
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1answer
182 views

Signal:noise ratio not really decreasing with ISO for Pentax

In SNR graphs for Pentax K-30 and Pentax K5 there is something I do not get. For ISO after 1600 the SNR doesn't really decrease. Moreover comparing with Nikon D3200, we can clearly see that until ISO ...
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10answers
2k views

Should higher ISOs really be preferred (all other things being equal)?

My understanding of the ISO setting on digital cameras is that, unlike film-cameras, changing the ISO does not evoke any physical change in the camera. Rather, it simply tells the camera to multiply ...
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2answers
155 views

Which is the factor that creates noise in a photo? [duplicate]

Possible Duplicate: What is noise in a digital photograph? This happens while talking photos on dark or night. The Black color is not black, it has some noise. What would be the reason for noise ...
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8answers
11k views

Is noise related to shutter speed as well as ISO?

I understand that as I increase ISO, I'll increase the amount of noise in the resulting image. With a constant aperture I can decrease ISO and slow the shutter speed (assume a non-moving subject, ...
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3answers
3k views

How to make the faces clear and bright in dim light photography?

I have a Fujifilm Finepix S2980 with which I do a lot of experiments. One thing which really bothers me is taking pictures in dim light. I wish to take decent quality pictures in dim light without ...