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A sensor is the digital camera's equivalent to film. It contains millions of tiny light-detecting areas called photosites, which convert light into an electric charge. After exposing the sensor to light, this charge is read from each pixel and converted into a digital image.

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DSLR Sensors vs Exmor APS HD CMOS Sensors, Product Recommendation [duplicate]

Possible Duplicate: What should I look for when shopping for my first DSLR? I'm a tad new towards DSLRs and Compact DSLRs (am I calling them right?), but here goes - What are the ...
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3answers
816 views

What advantages does a pure black and white camera have over colour cameras?

Now that Leica has released a pure black and white camera, the Leica M-Monochrome, I started to think about the advantages a pure black and white camera has compared to a colour camera. I guess you ...
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2answers
309 views

What is the effect of long exposure on file size?

Is it a rule that long exposure will produce a larger size file compared to a shorter exposure? It seems logical, since you are writing more data to the memory card when you expose for more time. ...
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2answers
131 views

What is the nature of noise in small-sensor cameras, and can it be overcome in the future?

What is physical nature of noise in small-sensor cameras? Is is thermal noise in the semiconductor? Is there hope that in couple of years, noise in small sensors will disappear, and small sensors ...
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285 views

How do digital sensors that capture one color at each photosite compare to sensors that capture many colors?

There are different type of digital camera sensors, those sensors that can capture only one color at each photosite and those who can capture more than one color at each photosite. Which one is ...
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How does the D800E reverse the effect of an antialiasing filter by adding another filter?

According to http://mansurovs.com/nikon-d800-vs-d800e the D800E differs from the D800 in that one of the layers of the filter reverses the effect of the initial low-pass filter. How does this work? ...
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4answers
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What are the pros and cons of different Bayer demosaicing algorithms?

Bayer sensors use a pattern of red, green, and blue pixels, and merge those together into a final color image, with one pixel for every single color sensor. This could be done through a "naive" ...
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169 views

What settings should be used for self-cleaning sensors?

This question mentioned a self cleaning sensor. I have a few questions in reference to self cleaning sensors. Is there a reason to clean the sensor at startup, shutdown, (or both) automatically? Can ...
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Is a self-cleaning sensor necessary when using only one lens?

The Canon 1100d lacks a self-cleaning sensor. If I use this camera without ever exchanging the lens, is the absence of a self-cleaning sensor a bad 'feature'? Are the bodies of modern DLRS cameras ...
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3answers
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How can I easily tell if a sensor or lens is damaged?

I am pretty interested in recognizing any damage to digital camera in very low level (without any advanced tests). For example, how can I identify the damage of a sensor or lens? If there are any ...
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3answers
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Does a 35mm prime lens show the same bokeh as a 50mm prime lens on a cropped sensor?

I came to know that a 50mm prime lens on a cropped sensor behaves like an 75mm prime lens. So, does the 35mm prime lens behave like a 50mm prime lens on a cropped sensor? If yes, then will it show ...
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984 views

How can I clean the sensor on a Panasonic LX5 compact camera?

I've noticed there appear to be some specs of dirt on the sensor of my panasonic LX5 and was wondering if anyone had any tips on how to clean the sensor on this camera? I found this link which has ...
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2answers
460 views

When is it more suitable to have a full sensor-camera instead of a crop sensor-one?

I've been reading about this a bit, and I get the sense that full sensor-cameras are best suited for shooting landscapes, whilst crop sensor-cameras are preferable for portraits and close-ups. Please ...
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2answers
3k views

Why is the sensor size small in D3100 as compared to D3000?

I thought Nikon D3100 must be more advanced than D3000 (because of the higher number and the increased price). But, the D3000's sensor size is 23.6mm x 15.8mm and the D3100's sensor size is actually ...
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5answers
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Why is there no full-frame but low res sensor?

So I just watched a review on the Sony NEX-7, which is 24MP in APS-C size.... I am a Canon user and I immediately think about the announced Canon Powershot G1X with almost APS-C sensor but at a lower ...
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3answers
2k views

Does change of lens affect a camera's megapixels?

I have a Nikon D40. It has only 6.1 MP. I am planning to buy additional lens for it. Can changing the lens of the camera increase or decrease the megapixels of the camera?
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2answers
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What is the meaning of “cropped sensor”?

What is the meaning of the term "cropped sensor"?
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1answer
1k views

What is causing this white spot in every photo with my D90?

Recently I noticed that the photographs from my D90 has an odd white dot in it. The dot is present in every image. The dot becomes clearly visible as I zoom into the image. I have attached a photo ...
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7answers
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Why can't digital camera sensors expose each photosite individually?

Why is it impossible for camera sensors to function the way the human eye can? What I mean is, why does a certain portion of the image have to be over/underexposed if we compensate for dark and light ...
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180 views

Do video cameras use the same image sensors as still cameras?

Do video cameras have the image sensors cameras have? I really don't know what I'm talking about, so if the answer was explained, I would really appreciate it.
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316 views

Where is this dust located on my sensor?

I have a really nasty looking piece of dust on my 550D's sensor, situated in the top right-hand corner of each image I take with anything higher than f/11. I am going to get a decent sensor cleaning ...
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Can you use alternative brushes to clean DSLR sensors?

A lot of praise goes to Arctic Butterfly when doing DIY sensor cleaning. However are there cheaper solution to brush off dust by using other non-sensor cleaning specific brushes? Most high quality ...
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3answers
308 views

Can condensation be formed in the camera sensor?

When entering a hot place after leaving a cold place, some condensation can be formed in the lens and manufacturers recommend you to avoid using the equipment in this state. So, if condensation can ...
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How does taking lower-resolution pictures with a higher-resolution sensor affect image quality?

Does taking a picture with 8 megapixel resolution with my Canon IXUS with a 1/2.3" sensor and 12M max resolution provides the same or worse image quality (particular, noise) as if the picture was ...
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783 views

Why did camera manufacturers create crop sensor cameras?

Why did camera manufacturers create crop sensor cameras? Was there a business reason? Did they figure that crop sensor cameras are cheaper to manufacturer, which would in turn lower prices and make ...
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Assuming a perfect sensor, what is the physical limit of ISO/pixel area?

Assuming that camera manufacturers can eventually make the perfect sensor that introduces no electrical noise to the signal, at what point (measured in ISO/area of a pixel) will shot noise be so ...
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What are the advantages or disadvantages of a back illuminated CMOS sensor?

The iPhone 4s uses a backlit CMOS sensor, and I have noticed that some other point and shoot cameras do as well. What does that mean for photography, and if it is a benefit why do DSLR cameras not use ...
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Can exposure be bracketed by many sensor readouts during single exposure?

I am getting into some HDR photography and was thinking of a new ways that camera manufactures could help us in capturing HDR pictures. Say you want to capture three image and you have a constant ...
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What is “pixel density”?

Apparently megapixels aren't a good way to measure the camera quality, so some people are referring to a relative measuring system called "pixel density". What specifically is this? What information ...
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3answers
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Why are larger sensors better at low light?

The top answer of What point and shoots are good in low light conditions? says that (1) a fast lens/wide aperture (2) reasonable ISO 400+ handling and (3) a large sensor when put together are critical ...
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6answers
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Do sensors wear out?

We all know that shutters wear out and they have a limited number of actuation's. The question I have is, do sensors wear out too? Do they suffer any kind of damage after each shot? Should I be ...
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Do megapixels matter with modern sensor technology?

Are more megapixels good? Are more megapixels bad? Do more megapixels increase detail? Do they make my images sharper? On the other side, is there a point that is too much? Do megapixels cause ...
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2answers
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Dust on the sensor, should I be worried?

I did a 30 second long shot without the lens and checked the sensor and saw some dust on my sensor (even though camera has sensor cleaning). I didn't see any defects on photos yet, but is it something ...
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Can I clean dust from a scratched sensor?

I have a camera with a scratched sensor (a Canon 1Ds Mk II) - can I clean the dust from the sensor? And if yes, how? By using the wet method? Or just by blowing air? The scratch is in the middle. ...
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Where is the color mosaic filter on a DSLR sensor?

I have been looking at this tutorial from Astostuff on taking off the hot mirror on a D70, but cannot figure out from the page where the color mosaic filter is located. Is it possible to remove the ...
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1answer
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Can the “Dust Delete Data” function on Canon DSLR be used with Lightroom?

My camera is 6 months old and I noticed there is quite a few spots on the sensor (especially when taking HDR shots of bright scenes or the sky) The hand blower does not lift these particles off the ...
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6answers
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Why are blown highlights particularly bad in digital photography?

I've heard that digital sensors are less "forgiving" of blown highlights than film. Why is this? There's something called "characteristic curves". How does this related, in film and in digital? Can ...
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2answers
566 views

What are the basic workings of the Lytro light-field camera?

lytro.com describes their new light field camera as being able to capture the entire light field, rather than just one plane of light, thereby allowing for a whole new set of post-processing ...
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8answers
5k views

How can I photograph welding?

My partner is creating a sculptural work using MIG welding and has asked me to document the process. I have a few questions regarding how to photograph it? Looking at the arc can damage your ...
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784 views

Does this look like a sensor problem?

I have these tiny dots in a lot of my pictures. They look like tiny stars. On this Nikon D60 I've tried cleaning the area where the shutter is (what's this called?) with a hand pumping duster, but ...
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1answer
591 views

Why does my Nikon D90 make a strange sound during built-in sensor cleaning, when my friend's D90 doesn't?

I noticed a quiet sound (like squeaking) when using the built-in sensor cleaning of my Nikon D90. In some forums I read about many people having this behavior with the Nikon D700 and some Canon ...
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1answer
299 views

Why might my camera show spots in video mode?

I own a Canon Rebel T1i, and when I try to record video, there are two dark spots on the screen. These do not appear when I take photos. Video (spots in center and right center): Photo: Does ...
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6answers
9k views

Why does a bigger sensor lead to a shallower depth of field?

It has been mentioned at a few places that a larger sensor results in images with a shallower depth of field. Example image: APS-C Canon 30D left, FF Canon 5D right, same lens, same composition, ...
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2answers
2k views

Why use a small aperture when trying to see sensor dust?

Here and there I read of people who set their lens to a small aperture while testing their sensor cleanness, supposedly to get the best image of dust speckles. However, the image of the on-sensor dust ...
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4answers
2k views

Is it risky or difficult to wet clean an image sensor?

I've discovered spots on the image sensor of my DSLR camera that cannot be cleaned using a blower bulb, so I would like to know the risk of problems, such as further image deterioration or damage to ...
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4answers
1k views

How many bits of data are typically actually captured by a digital camera sensor?

In a comment on this question someone suggested that camera sensors typically only output 12-14 bits of data. I was surprised because that would mean that 24 bits of color is only useful for doing ...
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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? ...
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2answers
765 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 ...
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4answers
1k views

Does the dpi number reported by camera in JPG have any meaning?

I have two cameras, a 6mpix Panasonic FZ8, and 14mpix Canon A2200. When I compare shots from two cameras, one of differences I notice is dpi number that camera reports in JPG info: FZ8 reports ...
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500 views

How do I get rid of these different spots after sensor cleaning?

I've just cleaned sensor on my Nikon D40x for the first time using sensor swabs and Eclipse solution. Here is a picture taken before cleaning and after . Dark spots on the first photo do not appear ...