Questions tagged [sensor]

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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Small spots on EOS m50 sensor [duplicate]

I had open my lens of Canon EOS m50 while I am on a ferry to a local island near by. Once I reach home I saw few spots on sensor which doesn't look like dust. I used swabs and cleaned the sensor it ...
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What causes this repetition pattern in a picture? (when re-arranging its pixels by their intensity - code included) [closed]

Just out of curiosity, I was playing with RGB coordinates and pixels of pictures. Then for some reason I decided to get all pixels of a picture, get the RGB coordinates/values of each pixel (eg. RGB(...
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107 views

Why does the green gain affect the blue and red values on a CMOS sensor with individual gain control?

I'm taking pictures of little surfaces (5 x 5 Millimeters) in an experimental setup with an ids camera that contains a cmos sensor. Afterwards the pictures are split into the 3 color channels (red, ...
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What would be the most technically unaltered/numerically close camera-to-monitor workflow using common software? [duplicate]

If the intention was to, as much as possible, shove the ADC output octets that were present in the camera right up the framebuffer and out the HDMI cable - possibly truncating LSBs, if possible ...
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Is there any camera with a square sensor?

For creators who wants to make videos for platforms like IGTV and youtube as examples you have two totally different formats. Portrait and landscape. You could obviously crop a video or photo from ...
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Since larger pixels increase depth of field and sensitivity, why don't we have large sensors with a low number of pixels?

If I understood correctly, the DoF (all other parameters fixed) increases with the pixel surface. So to have a high sensitivity together with a deep DoF, why don't we just have big pixels (and thus ...
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Does a sensor count the number of photons that hits it?

I'm interested in the grayscale image case. In a sensor there is an array of cavities which collect photons. (Source: Cambridge in Colour Digital Camera Sensors) Does each cavity count the number of ...
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Do different microlenses on EOS R / RP affect use with EF lenses?

I have read that EOS RP uses otherwise the same sensor as the 6D Mark II. However, RF mount has a lower flange focal distance than EF mount. Therefore, Canon has adjusted the microlenses in EOS RP to ...
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83 views

Calculation for getting dimension of object in image [duplicate]

I am trying to calculate the dimensions of an object in an image. This is a sample image I took to get height of the brown box. I have this white box which measures 16cm and I would like to know the ...
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Is there any long-term negative effects of frequent automatic in-camera sensor cleaning?

Many newer digital cameras offer an automatic sensor cleaning option in the menu that uses some sort of sensor vibration to shake off dirt. This strikes me as a source of potential long-term ...
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What does the solution used in DSLR sensor cleaning kits contain?

What is the actual solution used in DSLR sensor cleaning kits?
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Can smartphones with the same camera sensor have different image quality?

Xiaomi Mi 9 and Redmi Note 7 Pro have the same camera sensor — Sony IMX586 Exmor RS. Does this mean both smartphone have same image quality output when pictures are taken?
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Is there any real need for substitute filters for a manual-focus, live view full spectrum conversion?

Assumption: If I have some cheap/used/partially-broken-but-picture-taking DSLM, and want to use it as an experimental full spectrum camera, the only downsides to cleanly removing the filter stack and ...
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Do cameras actively filter out UV light, or only infrared?

I know that a camera has a filter in front of the sensor to limit incoming light to the visible spectrum, to replicate what a human eye can see. But wherever I look on the internet, I always read ...
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Does near infrared AF assist light work with sensor based autofocus?

Some flashes, cameras and wireless flash triggers (like Canon ST-E2) have a near infrared AF assist light that is invisible to the human eye. My understanding is that his AF assist light works at ...
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Why do DSLM designs almost never shift the sensor plane all the way back to save on thickness?

A common problem with mirrorless designs is that long, especially adapted or output-telecentric designs, still stick out far more than they would eg on a small film SLR or rangefinder. One obvious ...
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Pixels and photodiodes

A photodiode is the smallest element of a digital sensor, while a pixel is the smallest piece of information in a digital image. I wonder if the two terms can be used interchangeably or there are some ...
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Does red noise even at low ISO values mean a hardware problem with my camera's sensor?

I have an Canon 200D (Rebel SL). I am concerned about the red noise in the darker parts of the picture, at low ISO values. Especially in the blue sky. Could this be a hardware problem with a sensor? ...
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Why does purple lines appear in CCD?

I know CCD scans the array line by line and over voltage from even a single pixel can wreck the whole line. But why are these wrecked lines colored magenta?
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Why are camera sensors green?

When I look at a CMOS sensor it's green. But CCD sensor. photos in the internet show pink sensors. So what exactly defines the color of an camera sensor? Especially what defines colors of the ...
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Have I damaged my camera's sensor? [duplicate]

Excuse the image of the random cat, but I noticed these random purple spots/lines in all the pictures I've taken today. They're in the same location and in the same shape so have I damaged the sensor?
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dB ratings for sensor SNR, what do they specify exactly?

I find the use of dB values to specify sensor properties confusing.. A rating of 20dB SNR at a given ISO setting could mean, assuming a reasonably linear system: RMS noise voltage and thus luminance ...
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112 views

Will these particles on the sensor affect image quality?

I have a Canon Rebel T6. I'm really newbie and know very little about photography. I think I made and big mistake and accidentally let dust enter the sensor area and the mirror area. To visualize the ...
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86 views

What could be the reason for suddenly changing brightness in raw image?

A series of night shots show this abrupt change of brightness: It starts at approximately 60% horizontal and extends to the right corner. I didn't notice this effect before, the temperature was ...
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LIDAR burnout; ways to check for damaging infrared lasers before shooting besides looking for posted warnings?

The BBC News article Driverless car laser ruined camera describes a situation where a particularly powerful infrared laser from the LIDAR of a prototype car at the CES show damaged the sensor of a ...
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Are colours from CCD sensors different compared to colours obtained from CMOS sensors?

I heard multiple times that cameras with CCD (I am talking about consumer DSLR) produce more lively or simply more pleasant colours. I think it's a myth but it's not clear to me how much basis it has ...
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237 views

Sony A7 and A9 Camera Sensor - Why are the edges of the sensor beveled?

I recently cleaned my Sony Mirrorless camera sensor using both a rocket blower and a wet cleaning solution. I was able to successfully remove all the dust/smudges, but I do still have some dust on the ...
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What is causing these artifacts in a photo of lightning?

What are the almost pixelated edges in this photo called? What would cause it? The photo is cropped so it stands out more. I find it often happens with highlights with softer edges. You may need to ...
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276 views

Do Nikon sensor jpegs have a very slight yellow cast to them in the image compared to Canon?

I shoot with a Nikon D3400 and I am a beginner casual photographer. I shoot in maximum quality jpeg(NOT RAW) on auto white balance. Recently my friend and I were shooting some same subjects(my friend ...
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135 views

Why sensors won't cover full exposure circle?

Imagine that you have a round sensor that covers full circle that your lens can expose. Your camera should be able to shoot at any aspect ratio in any orientation. You won't have to rotate your camera ...
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Half of image is black - D3400

Nikon D3400 lent to girlfriend for Halloween. Now half of the live view image is totally black; same on photos but not on menu displays. She "cleaned" it before returning, so is my sensor toast?
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What is etched into the surface of the digital camera sensor? [closed]

I'm thinking it's light sensitive receptors, but then it could possibly be either pixels or film as well. I'm not really sure. So, if anyone is completely certain of what is etched into the surface of ...
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What are physical causes of clipping?

What exactly limits modern digital camera sensors in capturing light intensity beyond certain point?
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Mobile camera sensor specifications (database?)

I already know sites as https://www.dxomark.com/Cameras/Camera-Sensor-Database which are good databases for detailed sensors specifications, especially regarding DSLR. But I would like to find ...
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Signal to Noise Ratio over the years

I've been enjoying Marc Levoy's Lectures on Digital Photography and have reached this point. Marc has broadly said: Sensors have got better at reducing noise But pixels are gotten smaller so there ...
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My sensors are not working after shooting at sunset sun

I have a Nikon D7000 with a AFS Nikkor 18-200 Dx with VR. I took a pix of the sun going behind a mountain, trying to NOT get the sun directly, but I did. It was 1/3 way down but still bright . The ...
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Will digital exposure above unity gain result in raw file with full bit depth?

As I understand, digital cameras have a unity gain ISO: an ISO setting at which no gain is applied. Below this ISO negative gain is applied, in effect ignoring some of the photons, and above positive ...
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Does the pixel count of the image sensor equate to the number of pixels of the image? [duplicate]

The Canon EOS 5D Mark IV has a 30.4 megapixel sensor. Does that mean that it can produce ~30 megapixel images?
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Remove spot on sensor Olympus OM-D E-M10 [duplicate]

I've got a visible spot on the sensor of my OM-D E-M10 (Mark I). I think it's a tiny splatter. Can I clean it with a cotton swab and some alcohol for example? I assume there is a piece of glass in ...
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Does a long exposure in DSLR camera have a similar effect to a global shutter?

Regular DSLRs make use of mechanical shutters and progressive electrical readouts, and hence images are captured in a rolling shutter. But, when used to capture pictures with a long exposure, where ...
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How does on-sensor phase detection AF not impact the image?

My understanding is that some of the photosites on the sensor have additional functionality in them to measure phase, which in turn uses some of the energy that would have otherwise registered as ...
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116 views

How is wide field-of-view possible using a tiny sensor?

From looking at the FOV tables on this page, I can see that FOV is greatly reduced as sensor size decreases. It seems that 1/2.3 sensors would produced fields-of-view that are tiny, even at the ...
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56 views

Why would a webcam image be brighter in the corners, rather than in the middle?

I have a webcam mounted inside an integrating sphere, which is dimly lit by LED and produces nothing but sensor noise. It's part of a daft random number generator I built. This arrangement is like:- ...
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805 views

What are appropriate Circle of Confusion values for high-megapixel cameras? [duplicate]

Since the film days we have used 0.03 CoC for determining depth of field and similar calculations. In digital terms, does this best match with 6 or 12 or 24 or 36Mpixel full frame sensors? If this ...
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240 views

What could cause this strange purple stain in the image? Sensor damage?

Initial disclaimer, my hardware in question is a PTZ video surveillance camera (Hikvision DS-2DE5425IW-AE) which would make it off topic for Photography StackExchange. However the issue I'm having is ...
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What would be causing a thick black diagonal line in front of my camera's sensor?

I have a Canon XTi. On every photo I take I have a thick diagonal black line appear on the photograph. See an example picture: My next discovery came when I selected Sensor Cleaning: Manual in the ...
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620 views

How do I detect sensor sun damage?

I'm still new to photography/videography and I'm at the learning stage so I'm asking for your experiences and expertise. I recently bought a SJCAM SJ6 Legend and I shot a 1 hour 30 min timelapse with ...
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How to build an attachment to support lens?

I am using a D5200 and want to make an attachment to support the lens at a distance away from the camera body. (There will be no lens mounted to the camera. Then there will be a gap. Then the lens.) ...
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How can I tell if a scratch is directly on my sensor or on the filter above it?

I have what appears to be a scratch on my sensor. I can't see it on pictures taken with apertures larger than F16, but I do see them at F32. How can I tell if a scratch is directly on my sensor or on ...
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Is the color reproduction of different cameras inherent to the sensor or due to software?

Often, reviewers and camera users talk about the 'Color Science' of a particular brand of digital camera, e.g. it is said that Sony digital cameras do not have good skin tones. Is this 'Color Science' ...