Napioa - Wind Origins

Napioa - Wind Origins
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Image perturbation caused by electronic transformation and processing.

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1
vote
1answer
682 views

How to shoot good night photos with Nikon S8000?

Some time ago, I bought a Nikon Coolpix S8000, with big satisfaction for daylight shoots, but in using it I realized that my night shoots were more frequent than I expected. I tried to use it by ...
6
votes
2answers
680 views

What is the source of this multicolored noise in these samples?

I shot many long exposure photos (from 5 minutes to 30 minutes) back in December of 2010 with a two month-old Nikon D7000 and Tokina 11-16mm f/2.8 lens. The photos I took had very little noise. I ...
2
votes
1answer
202 views

Do cameras turn off their sensors when entering the menu?

Let me clarify this: In movie mode (or live view), the sensor is gathering light all the time, and due to this the heat starts to build up. This is a problem in certain situations, due to the heat ...
7
votes
5answers
2k views

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"?
25
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 ...
4
votes
1answer
786 views

What do the different noise reduction options in Silkypix mean?

I'm playing around with RAW files in Silkypix that came with my Panasonic camera and I am thoroughly confused by the sliders for the noise reduction and the Silkypix manual isn't of much help (at ...
8
votes
2answers
2k views

How to test noise?

I'm just looking for what's the best technique to test for noise on a camera. Like what settings are best? What type of photo is best? What lenses should I test with? Like those sorts of things. ...
12
votes
1answer
412 views

What is the statistical distribution of sensor noise?

Sensor noise is a random variation in pixel values, but what kind of random is it? Does it follow a normal distribution, one of the gamma distributions, or something funky like an F distribution? ...
8
votes
2answers
2k views

Why are sensors less sensitive to blue light?

This is a followup question to Why is the blue channel the noisiest?. The simple answer to that question is that sensors are less sensitive to blue, and therefore require more amplification, which ...
28
votes
3answers
4k views

Why is the blue channel the noisiest?

It is widely observed that the blue channel in digital cameras is the noisiest. I've certainly noticed that with my camera. Why is this? Is it an artifact of some particular technology (e.g. Bayer ...
7
votes
7answers
6k views

Cause of grainy photos?

Whenever I view my 12MP photos on my computer at 100% zoom (they're roughly 4200x2400), there always seems to be a lot of grain and noise to the image quality. What, specifically, causes this and what ...
105
votes
5answers
8k 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?
6
votes
3answers
311 views

How much does in-camera image processing affect noise on Canon DSLRs?

I've found out that some of photos take with my 5D MkII have more shadow noise than I like. I know there are some obvious settings that affect this, such as ISO a noise reduction settings. But there ...
13
votes
11answers
1k views

What noise removal tools work best, and why?

Can anyone recommend some good noise removal tools, free and commercial? Should support RAW and JPEG. Are certain tools better than others in particular situations? Do some integrate better with other ...
23
votes
8answers
3k views

How can I reduce the noise present when taking pictures without lowering my ISO?

I know that high ISOs tend to produce more noise, and some cameras' software can handle that noise better than others, but are there any other settings or conditions tha affect visible noise? I'm ...