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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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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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73 views

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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1answer
119 views

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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108 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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1answer
73 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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105 views

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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162 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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173 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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1answer
133 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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520 views

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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56 views

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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1answer
58 views

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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2answers
236 views

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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2answers
230 views

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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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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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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524 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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1answer
222 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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2answers
5k views

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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1answer
304 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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5answers
2k views

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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1answer
948 views

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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3answers
110 views

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' ...
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1answer
191 views

What is this fine grid on an image made using pinhole and Nikon D200?

I am a longtime photographer but not such an expert on the technical aspects of optics and digital sensors. I've been experimenting with my Nikon D200 and a home-made paper pinhole, coloured black on ...
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4answers
534 views

Can we improve phone cameras using separate sensors for each of RGB?

So I was reading all about the multi camera system on the new Huawei P20 Pro which really got me thinking about how we can use multiple cameras to improve image quality, especially in such a compact ...
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2answers
142 views

Can using a high resolution sensor and downsampling compensate for a soft lens?

In this question Does super-sampling produce good results? the difference in quality between using a high and low resolution sensor of the same size and then downsampling the high resolution one gives ...
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How many pictures can you take with a Sony mirrorless camera before the sensor fails? [duplicate]

What is the frames limit of the mirrorless cameras sensor? When should it be changed (for example on the Sony a6000 series or on the Sony a7)?
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How can I tell if a camera sensor is damaged?

I own a Sony a6500 and primarily use it for filmmaking. I was trying to clean the mirrorless sensor and used a rocket air blower to get dust out of the sensor but accidentally knocked it against the ...
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1answer
139 views

Where can I find an organic photoconductive film (OPF), Camera or Sensor alone?

This technology was announced in 2016, but I couldn't find any trace or update about it later. Is there any camera using it ? If not how can I buy any from Panasonic/Fujifilm ?
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1answer
75 views

Can dust or humidity affect the shift mechanism of a sensor stabilised camera?

Sony and Pentax, and probably others, use a shift mechanism in the sensor (movable sensor) for image stabilization. While I see many benefits with this approach, how are these sensors protected ...
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1answer
145 views

Removing sticky particle from sensor [duplicate]

I have two particles on the sensor of my Sony a6000. Both are round and about 0.3 mm in diameter. The spots are only noticeable in bright areas and are easy to remove with Capture One's spot removal ...
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4answers
218 views

How to get rid of black these black oil spots which a professional cleaning service said can't be fixed?

I am using a Canon EOS 7D. But my photos have black spots in the same position. I tried sensor cleaning from a professional and the result is the same. He told me that it is due to oil spots which can'...
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0answers
35 views

Menu/Picture Preview NA, Automatic Focus not working

I have a Canon Rebel XSI. It is from 2008. Original everything except lense. I cannot get the menu option to display in any mode, pushing the button does nothing. I cannot get any pictures I recently ...
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344 views

Is the Panasonic GH5's sensor likely to get damaged while in my bag? [duplicate]

The Panasonic GH5's sensor is suspended in a magnetic field when in use, allowing it to move on 5-axis to stabilise the image. However when not in use it is completely loose and flops around in its ...
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3answers
131 views

Why are the lights fuzzy/hazy/blowing out in my pictures?

I just got a Canon 70D off eBay and have been taking night pictures and things were ok. Then, without warning, the lights in my pictures got blurry and hazy, maybe overblown. It's happened with both ...
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1answer
148 views

Minimum sensor size to get a separation between the subject and the background [duplicate]

What is the minimum sensor size need to get a separation between the subject and the background (bokeh) ? Print size A5 Not using a DSLR . Assuming max aperture is f/2.8 at wide end.
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2answers
336 views

How can Sony A7r iii get more dynamic range than A7r ii from the same sensor?

Acording to this article https://fstoppers.com/gear/sony-announces-a7r-iii-solid-improvements-built-around-previous-generations-424-201012 the Sony A7r iii uses the exact same sensor as it’s ...
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1answer
192 views

Is the Canon 650D still a good choice? [duplicate]

I am planning on getting my first DSLR soon. I'm torn between the 1300D and 650D because they are about the same price right now. I love the fact that the 650D has a movable touchscreen and a mic ...