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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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6answers
597 views

Why don't sensors have a wider aspect ratio?

than 3:2, like 16:9 or 16:10? Given the popularity of widescreen TVs and computer monitors with wide aspect ratios, and that most photos are viewed on a screen, rather than printed, and that the eye ...
2
votes
2answers
403 views

How does sensor size relate to image resolution?

How is it possible that with a particular sized sensor (say APS-C) it is possible to get different sized image cameras (by this I mean a 10 megapixel camera, a 15 megapixel camera etc)? Where does ...
2
votes
3answers
469 views

Which camera/lens combination achieves the highest possible image quality for macro?

Doing lots and lots of research I have a hard time time finding the ultimate answer to this question. I would like to shoot macro and products and aim for maximum sharpness and reproduction. Maximum ...
2
votes
2answers
328 views

What is the meaning of “cropped sensor”?

What is the meaning of the term "cropped sensor"?
2
votes
2answers
674 views

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 ...
2
votes
2answers
308 views

Can an Optical Low Pass Filter be applied via a lens filter?

I constantly see references to video being the application where an Optical Low Pass Filter is most useful, but it seems that still images do best without one. Would it be possible to then have a ...
2
votes
2answers
152 views

Why don't sensors on satellites and rovers degrade as quickly as DSLRs on the space station?

I just saw a report on NASA TV that said that dSLR cameras are replaced every 12 to 18 months because of the large number of dead and hot pixels, but video cameras last much longer, and they were ...
2
votes
1answer
860 views

how does full frame cameras give better bokeh than crop sensor? [duplicate]

Possible Duplicate: When do the differences between APS-C and full frame sensors matter, and why? Why does a bigger sensor lead to a shallower depth of field? When I compare my camera ...
2
votes
1answer
346 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 ...
2
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1answer
60 views

Contradiction in information resources on capturing UV light with a digital sensor [duplicate]

I encounter a contradiction. Many resources state that a digital sensor are unsensitive to UV light. Even wikipedia, "However, newer photographic film and digital cameras are highly insensitive to ...
2
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1answer
294 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 ...
2
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3answers
4k views

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 ...
2
votes
1answer
674 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 ...
2
votes
2answers
268 views

How to estimate camera sensor size?

I am using a smartphone for capturing photos and I need to estimate the camera sensor size (mm*mm). I have the resolution (in pixels) and the focal length (in pixels). I can also measure the size of ...
2
votes
1answer
121 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 ...
2
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2answers
1k views

Nikon D600: how to fix hundreds of photos with dust on them?

Like many D600 owners, I'm hoping that the dust on sensor issue that comes with this otherwise nice camera will somehow solve itself. In the meantime, I have hundreds of shots that I took with an ...
2
votes
1answer
104 views

What is the native color gamut of a modern digital sensor?

What is the area of CIE 1931 diagram that is being covered by contemporary digital camera sensors? I can find triangles for LCD panels being comapred to sRGB and aRGB and ProPhoto. There are always ...
2
votes
1answer
544 views

Does the Canon EOS Rebel T5/1200D has any dust related problems?

I’m planning on purchasing the Canon EOS Rebel T5/1200D very soon, it’s the only DSLR that fits my budget (other one is the Nikon D3100 which I don’t plan to get). I like everything about the camera ...
2
votes
1answer
462 views

What is causing this one line on all my photos from Nikon D3100?

Whenever I take a picture with my dslr, there is a strange line that shows up on the left of the picture all the time. Can this be fixed my myself, or do I have to send this one in?
2
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2answers
162 views

CCD sensors use a digital shutter. Why don't the more expensive CMOS sensors?

This answer mentions that CMOS sensors "cannot" use digital shutters where as CCD sensors can. Even if some models have the ability to, it is certainly typically for CMOS sensors to use mechanical ...
2
votes
1answer
120 views

Does a deeper photosite increase the dynamic range?

As I understand, a bigger photosite (on the sensor) enables a bigger dynamic range and also better high ISO performance. Is there a reason not to make the photosite deeper?
2
votes
1answer
395 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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2answers
188 views

Why can I recover more highlights RAW files from some cameras than from others?

I have two cameras that both shoot raw: Nikon D800 and Fujifilm X20. When editing I have discovered that I can recover a lot more information from a D800 raw image than a X20 raw image. Is it because ...
2
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1answer
127 views

Does security scanning a camera with battery inside cause damage to the sensor?

I was at 911 memorial last week. My Fuji S-1 Pro camera was scanned with the battery installed. Security personnel would not let me remove battery. Since then, a dark spot shows up on photos. This has ...
2
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0answers
83 views

How Focal Lengths is related to Sensor Size? [duplicate]

Possible Duplicate: What is the difference between focal length and crop factor? I was watching a video review of Tamron 70-300 lens where he mentioned that effective Focal length for a ...
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4answers
297 views

Have DSLR sensors made improvements since the transition to CMOS?

I know that CMOS sensors appeared in the beginning of 90s, and evolved up to 2000s. I'm mainly talking about high ISO photos quality. For example, Canon 5D mark 3 has better results in high ISO tests ...
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1answer
120 views

What are the main limiting factors for dynamic range in modern cameras?

Another question got me thinking about what is limiting dynamic range in digital cameras. From my understanding the precision of the analogue-to-digital converter, i.e. how many discrete levels it can ...
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1answer
193 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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4answers
111 views

Can exposure parameters be kept high even at high ISO sensitivity, to keep image quality up?

Following is from Film speed Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ...
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1answer
74 views

Why is a camera's dynamic range expressed as its photosite capacity divided by the read noise level?

For example, if a camera has a dynamic range of 44900/10, why would the range of greyscale levels available is equal to 4490? I know that 44900/10=4490 but this kind of reply didn't satisfy me. Let's ...
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1answer
65 views

Same mfg process = same performance in FF vs. cropped sensor?

I've seen generalizations that full-frame sensors tend to exhibit better low-light performance and dynamic range than a cropped-sensor specifically because they tend to use larger photosites that ...
1
vote
2answers
401 views

Sony A7R Noise compared to Nikon D800/E Sample Explanation

I am looking for a high resolution camera for fine art prints and the Sony A7R seems great since it has the same Sensor res as the D800 in a smaller enclosure. For some reason when I look at sample ...
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3answers
316 views

How much does the sensor affect image quality if shooting in RAW?

Knowing there are different sized sensors and a nearly unlimited combination of lenses with the various cameras, since RAW captures RAW light data, how much does the sensor itself play a role in ...
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2answers
80 views

Point and Shoot sensor

In a point and shoot camera, is the sensor exposed even when the camera is off? ie. If the camera is off, can the sun still damage the sensor? Thanks very much.
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4answers
604 views

Question About the D600 Dirty Sensor Test - Why Use a High f-Stop? [duplicate]

There is a lot of buzz about the dirty sensor problem on the D600, which is apparently caused by some lubricant splattering onto the sensor and accumulating over time. My question is about the test ...
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2answers
1k 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 ...
1
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3answers
394 views

How does the spectral sensitivity of different sensors affect the resulting photo?

I am learning about light and color formation but I don't understand how does the sensitivity affects an image. Take for instance the different sensitivities for two "cameras" for each RGB channel ...
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vote
2answers
186 views

Big sensor and landscape photography, DoF

I've been an owner of point & shot cameras for some years. Now, I'm considering to move to bigger sensor cameras (4/3, asp-c) because I really hate the noise that small sensors produce on low ...
1
vote
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 ...
1
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1answer
57 views

General guidelines on choosing a lens for an image sensor [closed]

Not sure if this is the right place to ask this question, but here it is: I am trying to get up and running a VGA image sensor: 2755um x 2050um image area with 4.2um x 4.2um pixels and 640x480 ...
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2answers
331 views

is a camera sensor size cropped according to the change in pixel aspect ratio of a resolution?

As an example, canon 6d full frame has the highest resolution of 5472 x 3648 with a pixel aspect ratio of 3:2 . As this is the highest I assume this is utilising the full size of the sensor. If the ...
1
vote
3answers
533 views

Do these colored streaks mean that my CF card is bad?

I have been shooting with the same Nikon d700 for about three years (about 200k clicks). I started seeing a streak run across one out of every 250 images (example here: http://wp.me/aRb6L-1lT). So, I ...
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1answer
60 views

How fast does a sensor cool down sufficiently after a long exposure?

If I am taking long exposures for star trails how long should I wait between exposures to allow the sensor to cool down?
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0answers
25 views

Relationship between the focal length and sensor size [duplicate]

What is a relationship between the focal length of the lens and the sensor size to achieve the same image area ?
1
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0answers
188 views

Canon 6d color noise (and compared to 50d)

my first day with 6D, upgraded form 50D. Wouldn't be pixel peeping but something unusual caught my eye when I opened photos in Lightroom this morning. The color noise pattern is completely different ...
1
vote
0answers
69 views

Bright dots on all images [duplicate]

Possible Duplicate: Why is my camera showing a lot of stuck red and white pixels? Recently I noticed that on every picture I take, there are some tiny (close to pixel size) bright dots ...
1
vote
1answer
105 views

Why do I get white images with black vertical stripes?

Apparently my 3 year old Canon EOS 550D is fed up with my style of photography and decided to explore abstract arts instead. All it shows on the LCD and stores on the SD card is this: When I ...
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4answers
130 views

Dark spots - sensor toast?

I can't seem to get rid of some very annoying dark spots that are very noticeable under certain lighting conditions. I've taken a test shot of my monitor showing a white background and amped up the ...
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votes
4answers
828 views

Shooting 50mm EF vs EF-S

I have a Canon EOS 550D with a APS-C sensor. I have two lenses, (1) Canon EF-S 18-135mm f/3.5-5.6 IS and the (2) Canon EF 50mm f/1.8 Mk II. If I use the 50mm focal length in the first EF-S lens... I ...
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2answers
114 views

why is a compact sensor brighter than a APS-C size sensor

So I may be missing something but I cannot think what it can be. I have a Sony compact hx9v and an NEX-6. the 16mm on the NEX is very similar to the compact at its widest, so I thought I would ...