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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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88
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4answers
5k views

What is “ISO” on a digital camera?

What is "ISO" in general, and how is the scale defined? How does the ISO scale for film speed differ from ISO sensitivity as used in digital cameras? Is lower ISO always better?
22
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2answers
1k 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 ...
4
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2answers
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Which noise reduction software has the best results?

Have you tried different software, compared the results and reached a conclusion? I only used Nikon's DFine and Lightroom's noise reduction tool and found the results very similar. Lightroom's has ...
28
votes
9answers
1k 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 ...
7
votes
4answers
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Does noise in images depend upon “Megapixels” or “ISO”?

I have a question about image quality. Does noise in an image is depends upon "Megapixels" or on "ISO"?
22
votes
5answers
853 views

Is there any noise difference between averaged and long exposure photos?

Let's suppose I'm on a tripod, photographing a perfectly still scene (also dark) and I take these photos: 5 photos at ISO 3200 and 1s exposure 1 photo at ISO 100 and 5s exposure There is a common ...
15
votes
4answers
4k 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 ...
20
votes
8answers
3k views

How much “noise” is acceptable in a photograph?

I've been at photography for a little over a year, and I primarily do landscape and wildlife/bird photography. Most of my work has been a learning experience so far, with few shots actually something ...
9
votes
4answers
3k views

Astrophotography picture with too much noise. How do I correct this in postprocessing?

This is the Milky Way above Kakadu National Park, Australia, and my first try at astrophotography. Thirty second exposure, f/4.0 at 17mm with ISO 12800 (!!) which in hindsight probably was way too ...
13
votes
3answers
4k views

What are the pros/cons of the high-ISO noise reduction feature on D90?

So my D90 offers "High-ISO Noise Reduction". Sounds like a good thing, but obviously there must be a cost of some kind. The settings are "Off", "Low", "Normal", and "High", and the default is ...
11
votes
2answers
1k views

What exactly is “base ISO” and how do I find what is base ISO on my camera?

If I understood correctly, base ISO is in full stop steps from the lowest possible ISO setting on my camera. For example if the lowest setting on my camera is ISO 100, than the following table would ...
16
votes
5answers
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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 ...
4
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3answers
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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 ...