Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
by Saaru Lindestokke                

Submit your Photo
Hall of Fame

Please participate in Meta
and help us grow.

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.

learn more… | top users | synonyms

2
votes
2answers
951 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 ...
2
votes
2answers
241 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
votes
1answer
135 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
votes
0answers
35 views

Are there industry standards or specs for image sensor resistance to damage from intense light?

While the occasional snapshot that includes the sun is generally safe, there are certainly combinations of lens and duration that can damage an image sensor if the sun or other sufficiently bright ...
2
votes
0answers
85 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 ...
2
votes
1answer
240 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 ...
1
vote
4answers
384 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 ...
1
vote
3answers
150 views

A/D conversion, processors marketed less actively than sensor characteristics?

In most literature about digital photography, there is some info-graphics about the path of the light signal from sensor to the storage. It starts with sensor, then there is the ...
1
vote
2answers
109 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
368 views

Which sensor “full frame” vs. APS-C (1.6 crop) gives more distortion?

Which sensor "full frame" vs. APS-C (1.6 crop) gives more distortion using the same lens? I mean, would a 10mm lens on a full frame camera show more or less distortion than if it were on an APS-C (1.6 ...
1
vote
1answer
205 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.
1
vote
3answers
243 views

Are the stops of the dynamic range of a cameras sensor the same as the stops the light meter shows?

My name is Elefterios and I am studying photography and audiovisuals. Currently I'm on my last year doing my thesis project related to timelapse. On the HDR Timelapse chapter I'm writing a short ...
1
vote
4answers
127 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 ...
1
vote
1answer
126 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 ...
1
vote
2answers
226 views

Why is FF sharper than crop body for the same framing of the same object?

Take an FF body and a crop body, with similar MP rating - and the FF body will give a sharper image of the same object. At least, that seems to be the case - as here: ...
1
vote
3answers
479 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 ...
1
vote
4answers
181 views

How does “crop factor” relate to the area of a sensor compared to full frame?

What is meant when someone says that a 1/2.3 sensor has a crop factor of 6.22? How many times the area of a 1/2.3 sensor is a full-frame sensor? Please include plenty of details. Another ...
1
vote
1answer
75 views

Blur each pixel independently on sensor to reduce moire effect

If I understand correctly, sensors can produce a moire effect because their subpixels are separate (each one is affected by a different portion of the image), so to stop this effect, some cameras have ...
1
vote
2answers
96 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.
1
vote
4answers
828 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 ...
1
vote
2answers
54 views

Image stabilization in interchangeable lens camera body?

Are there any interchangeable lens cameras which have image stabilization in their body too? If yes, does it help more to compensate images's shakiness or will it negatively affect the lens' image ...
1
vote
2answers
128 views

Does A RAW file exist containing the full dynamic range of a natural scene with a ratio of 100,000:1?

I've just read Karl Lang's excellent whitepaper - Rendering the Print: the Art of Photography. In it, he mentions that the ratio of light to dark in a 'natural scene' can have a ratio of 100,000:1, a ...
1
vote
2answers
2k 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
vote
3answers
136 views

What causes noise floor in an image sensor?

In the book Image Sensors and Signal Processing for Digital Still Cameras, it says that Read noise, or noise floor, is defined as noise that comes from the readout electronics.Noise generated in a ...
1
vote
2answers
127 views

What is it called when a camera generates files with more megapixels than the actual sensor provides?

I found in many Android devices that the "real array size", which is the actual pixel count of the camera sensor, is lower than the 4:3 Max picture the user can take. For example: Sensor Array = 1616 ...
1
vote
3answers
963 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 ...
1
vote
1answer
196 views

Will black level of one sensor reduce its dynamic range?

For one camera, the black level of the sensor will make the output non-zero when it is covered. For example the output of the sensor is 10bit and black level is 63, if the output is reduced by black ...
1
vote
2answers
216 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
2k 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
vote
1answer
145 views

Will sun damage to a sensor create an unusual amount of noise in images?

Recently I was playing with my Sony α6000 camera, taking some shots of birds in the morning and also the sun. It was after taking the shots that I stumbled upon the fact on the internet that sun ...
1
vote
1answer
151 views

Imbalance in green pixels

Question in brief: at a sensor level what are the typical causes of an unequal response between adjacent green pixels? Background: I'm experimenting with a sensor, which is typically deployed in the ...
1
vote
1answer
161 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 ...
1
vote
2answers
792 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
780 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 ...
1
vote
0answers
63 views

Quilted/Tiled Image Sensor: How do you eliminate stripes of missing photos in huge quilted sensors?

Background: This question is largely inspired by one of the answers in: What limits the size of digital imaging sensors? So the answer mentions uber-large image sensors that are made by "quilting" or ...
1
vote
0answers
27 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
vote
0answers
327 views

Is it normal for the Canon 6D to exhibit more color noise compared to a 50D?

My first day with 6D, upgraded from a 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
73 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
91 views

Does sensor type affect image quality? [duplicate]

I've recently discovered snapsort.com and use it to compare other cameras with the one I own. When comparing Pentax k10D with the K-x model I learned that the K-x has a CMOS sensor and that ...
0
votes
4answers
199 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 ...
0
votes
6answers
427 views

Why does Sony say that a 35mm lens is “35mm equivalent when used with an APS-C camera?”

I'm thinking of getting a Sony A6000 with a Sony SEL35F18 Lens. I'm a little confused about the actual focal length (and/or field of view) of the lens when attached to an APS-C sized sensor. The ...
0
votes
2answers
133 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 ...
0
votes
4answers
164 views

Why do camera manufacturers advertise image processors but not the sensor itself?

Camera manufacturers often advertise their image processors version in advertisements, such as DIGIC 6 (Canon), EXPEED 5A (Nikon) and many more. But we never see they advertise the sensor they are ...
0
votes
2answers
515 views

Effective focal length of kit 16-50mm lens on A6000 (APS-C 1.5x crop factor) [duplicate]

This is likely a tedious question for you guys but, as a camera noob, I'm miffed, so please bear with me. I have a: Sony A6000 (APS-C 1.5x crop sensor). With kit lens: SELP1650 lens (16-50mm) So, ...
0
votes
2answers
4k views

What is the difference between APS-C and Full Frame sensor? [duplicate]

Possible Duplicate: When do the differences between APS-C and full frame sensors matter, and why? I was doing research in buying the Sony NEX-7 camera, but today the news was all about the ...
0
votes
2answers
324 views

How is data in a camera's colorspace transformed into XYZ or a standard RGB space?

I have a canon 600d that says it uses sRGB. How is this even possible without having the same spectral sensitivity spectrum as a standard observer? It is possible to define the matching functions of ...
0
votes
1answer
118 views

can you remove a hair on the image sensor in light room?

i took a series of pictures yesterday and discovered that shooting around f/13, f/16, there is what appears to be a hair located on the image sensor and is visible in the pictures where the lens is ...
0
votes
1answer
242 views

How does long exposure photography work on digital cameras?

For analog photography it's pretty easy, the film is exposed to light during the exposure time, but what about digital sensors ? As far as I know a sensor can't "be exposed" for a long period of ...
0
votes
1answer
28 views

Canon APS-C maximum sensor size

Given that Canon APS-C cameras differ in sensor size (e.g. 70D has a 22,5 x 15,0 mm and 700D has 22,3 x 14,9) is it possible for future models to switch from a 1,6 to 1,5 factor like Nikon crop ...
0
votes
2answers
110 views

Should I be worried about the pixelation in my photo? [closed]

I took a photo of a lake and while editing it I found that the image actually had sensors pixel view all over the picture. Is this something I should worry about? Here in my photo, Pixels of the ...