32
votes
Why would using higher ISO and faster shutter speed yield more noise than using lower ISO and slower shutter speed?
So I first shoot with ISO 1600 and shutter speed set to 1/125 second and then I shoot with ISO 3200 and shutter speed set to 1/250 second. The amount of light should be identical and indeed both shots ...
- 173k
23
votes
Accepted
Lots of noise in my hockey pictures. What am I doing wrong?
A few things you can do to improve your results.
Use ISO 5000 or 6400. The way Canon DSLRs handle the ISO settings between the full-stop settings (100, 200, 400, 800, etc.) means ISO 5000 is cleaner ...
- 173k
12
votes
Does Manual iso = low noise?
TL;DR: In low light conditions, selecting manual or auto ISO is a decision about risks: having lower or higher noise vs. the probability of blurred pictures vs. time.
ISO, aperture, exposure time - ...
- 686
11
votes
Is there any point in ultra-high ISO for DSLR [not film]?
For some sort of photography high ISO is very important.
At some point the picture quality does not matter as much as having at least taken a photo, even if it is very noisy.
News journalists or ...
- 143
10
votes
Does Manual iso = low noise?
No, there is no difference between Auto ISO choosing ISO 800 versus manually selecting ISO 800. The end result is the same: the photo is taken with an ISO value of 800.
Consider this scenario: You ...
- 364
7
votes
Sony a7: Is there more noise for ISO <100?
ISOs lower than 100 on the A7 are not "real" in the sense that they don't lower the gain on the sensor, they just instruct the camera to increase exposure time as if the sensitivity was lower. The net ...
- 118k
7
votes
Accepted
Does changing the ISO of a modern digital camera really change the gain of an electronic amplifier?
Yes
Here comes the definition of Circuitry, from whatdigitalcamera.com
CCD and CMOS sensors differ in terms of their construction. CCDs
collect the charge at each photosite, and transfer it from ...
- 4,143
6
votes
How can I measure noise from the photo?
Noise is the difference between what the sensor measures and what it should have measured. If you take a photo with the lens cap on (or with some other means of completely blocking any light from ...
- 31.6k
6
votes
Is there any point in ultra-high ISO for DSLR [not film]?
Beyond the sensationalist title, I think what you are asking is simply - Are my results typical?
To which I'd answer, yes your results are typical and expected.
I don't often try to shoot in the ...
- 46.4k
6
votes
How much ISO noise is removable in post?
The moon is really a special case, because it is mostly grey. So you can remove chroma noise by just picking a channel (green, usually). This also removes some of the chromatic aberrations on the ...
- 18.3k
6
votes
Does Manual iso = low noise?
First there is no such thing as "no noise". Even on base ISO you have noise in the photos.
And set ISO manual do not reduce noise. If you have two photos, one with auto ISO 100 and one with ...
- 10.1k
5
votes
Astrophotography exposure setting for noise reduction
The best way to deal with noise in the situation you describe is to use a form of dark frame subtraction. If your camera doesn't offer such a built in feature, take a few frames during your session ...
- 173k
5
votes
Does any software do denoising on Raw files before demosaicing?
Except for dark frame subtraction, which helps get rid of (non-random) pattern noise,no noise reduction is done at the pre-demosaiced level. There are simply too many variables that come between the ...
- 2,351
5
votes
Accepted
Does any software do denoising on Raw files before demosaicing?
darktable has a "raw denoise" module that does noise reduction before the demosaic step. In practice, it is rarely better than the other modules that work on the demosaiced image.
Most noise ...
- 1,683
5
votes
Best way to remove the red tint in shadows astrophotography
This is going to be a really quick example of how to do it. You'll have to be a bit more precise when you do it yourself.
Add a Hue/Saturation Adjustment Layer by clicking on this icon beneath your ...
- 315
5
votes
Accepted
Doubling ISO vs summing pixel values from 2 shots - different?
For #1 and #2.
Doubling exposure and stacking two exposures are going to be similar, but not exactly the same. Doubling exposure means you get twice as much signal, for a single unit of read noise. ...
- 70.5k
5
votes
Why are all indoor pictures with my camera grainy?
You're the victim of typical indoor light and small sensor. It's darker indoors than what you think.
The DC-FZ82 has a crop factor of 5.6. To put this into context, even entry-level DSLRs and ...
- 6,453
5
votes
Does Manual iso = low noise?
You are muddling two things:
The particular ISO value chosen (100, 200, 1200, etc)
The way of choosing that value
It is the value chosen which affects the amount of noise: a high value is more ...
- 250
4
votes
Does any software do denoising on Raw files before demosaicing?
Demosaicing and noise reduction should be done simultaneously. It's best to use the DCRaw program to extract the raw pixel data and then to tackle the problem of reconstructing the image from first ...
- 3,576
4
votes
Better tools/techniques to merge multiple high-ISO images for noise reduction?
I use the following programs to do work involving image stacking.
The free of charge Hugin panorama stitcher uses the executable "align_image_stack" program, this program can be copied to some ...
- 3,576
4
votes
How to best filter away high ISO noise in Gimp?
Adding some info to Akram's answer.
You could use try some of the filters from G'mic (a "plugin pack" for the Gimp which has a lot more filters than just noise removal ones). Here's its website and ...
- 141
4
votes
What is "ISO" on a digital camera?
Film speed
In analog photography, ISO measures the sensitivity of the film to the light. A film with higher speed will reach its saturation (or overexposure) point faster.
You can use a low-ISO film ...
4
votes
Accepted
What matters for low light performance?
If you are genuinely serious about doing night photography you would be much better off with a full frame camera. A used 5D Mark II (or maybe even a well used 6D if you're willing to wait on a good ...
- 173k
4
votes
Accepted
How close are we to the theoretic limits of sensor low-light performance?
Obviously, if we get this ratio to just "1", we'd get our perfect photon counting device, and clearly we aren't there yet, but with the commercially-available sensors in 2017, how close are we?
The ...
- 1,803
4
votes
Why am I getting a lot of noise at 1000iso when my camera says it can go up to 6400?
It also depends on the subject. If your subject has a lot of flat black areas the noise will show up much more than on a patterned colourful/white area.
As already stated the camera's max ISO is not ...
- 188
4
votes
Are there Lightroom plugins for noise reduction which work on RAW data?
It sounds like you want to use an alternate noise reduction algorithm integrated into Lightroom's RAW conversion, as an alternate for or addition to the built-in noise reduction.
I don't think there ...
- 142k
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