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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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It is possible to take photos from the monochrome/depth/etc. camera sensors on an Android phone?

Newer phones usually have multiple camera sensors, including depth sensors, monochrome sensors, etc. These are usually used by camera apps to capture depth in order to create "bokeh" effects....
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Calculating FOV for mismatched lens/sensor size

I have this 50mm lens that gives the FOV for a 2/3" sensor in its spec sheet: Diagonal: 12.6° Horizontal: 10.1° Vertical: 7.6° I have this camera, which, according to its spec sheet, has a 1/2....
Jason C's user avatar
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How is picture format related to sensor format resolution?

The full resolution of the Samsung S23 is 50MP, the sensor has a 1/1.57" format. If I take a photo in 9:16 format, the resulting images are only 37MP - so far so good, the full sensor isn't used ...
iwab's user avatar
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Cameras with more than 3 color channelsa (ideally 12) and digital formatting

Apologies in advance for the superficial knowledge. I'm doing some sleuthing to help a friend who's about to do a research project and I showed him research on UV photography to find invsibile ...
Mike's user avatar
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Building an imaging array with multiple sensors?

If I purchased two image sensors that had a resolution of 80x62 with 45 degree field of view, would there be an easy way to concentrate two sensors into a resolution of 2x(80x62) with a 45 degree ...
Evan Carroll's user avatar
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Lens out of focus? - Digicam Panasonic Lumix DMC-FH20

Recently, the pictures on my digicam have been coming out like this (img 1) — out of focus, and with a black corner on the right. The black corner would disappear if I tilt the camera to the left (img ...
Billy Smith's user avatar
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How can I measure the flicker frequency of a light source with my phone?

I have a Hue light and want to measure the flicker frequency (due to the PWM) without buying an expensive photometer. Is it possible, to calculate it with such an Image, by counting the bars from the ...
iwab's user avatar
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Giant bright spot on right of image in all photos?

I've had a Canon G1X (mk 1) in an outdoor enclosure for the last 2 years taking a timelapse (6 images every 10 minutes). Recently all the images have a giant bright spot on the right side of each ...
nerdfever.com's user avatar
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3 answers
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Is this a scratch or a smudge on the Sony A7iii sensor?

I recently bought a Sony A7iii and have been using it daily for the past 2 weeks. I noticed this on my sensor, are these scratches or can they cleaned by a camera sensor cleaning kit? I have not ...
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Resolution on smaller vs larger sensors

I was reading this paper which states that My question is in regards to the first paragraph. I was first imagining, that if I were to try to take the same photo on a smaller sensor as on a large ...
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Wrapping my head around the signal to noise ratio

To my knowledge the signal to noise ratio when talking about shot noise, is defined as the mean signal divided by the standard deviation. In the Poisson distribution, which can be used to model shot ...
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Airy disks and pixel pitch on circle of confusions?

I read in this paper by Toshiba, which is in regards to optics in machine vision, that In machine vision, which processes each pixel of an image sensor at high brightness levels, the permissible ...
vannira's user avatar
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How to Cut Sensor Filter Glass?

Context - I've modified my Sony A7S for astrophotography by removing LPF2. Upon doing so, I've found that my lenses no longer achieve focus at or near infinity (they're older A-mount manual lenses). I ...
G.H.'s user avatar
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Are there any advantages of Tetra/Nonapixels in smartphone cameras over bigger pixels?

Newer Samsung smartphones have sensors with absurd pixel counts like 108 Mpx where pixel size is 0.8 micrometers but they are grouped in 3x3 arrays of the same color making them effectively 2.4 ...
VaNa's user avatar
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What are these small features on the corners of a camera sensor?

These are the images, my microscope suffers from some pretty large chromatic aberration, so dont trust all of the colors completely. The sensor in question is an IMX585 sensor, from a player one ...
Topcode's user avatar
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Like how the chemistry in celluloid film determines it's look, can Colour Filter Arrays in digital cameras be designed to produce a particular look?

For example, a colour filter array with deeper reds, or one with warmer blues or one with a kodachrome look etc. This is of course with Color Accuracy not being a priority here.
LucaMancini's user avatar
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Would there be any deficiences of an RGB Striped Array sensor vs a Bayer CFA sensor?

In the 2000's two digital cinema cameras, namely the Panavision Genesis and Sony F35, were launched with a pretty different sensor design called the RGB striped Array sensor (only these two cameras ...
LucaMancini's user avatar
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4 answers
817 views

Is this a scratch or a smudge on the sensor?

There is this (rather discounted, but still expensive) Sony a7 III that someone is selling and it has this picture: Supposedly it works "flawlessly", but to me the bit circled in blue looks ...
Nobody's user avatar
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3 answers
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Why don't cameras have dynamic sensors

A sensor could have different pixels reset at different time, according to its brightness. It would completely remove the problem of dynamic range, wouldn't it? If a pixel exposure becomes greater ...
ihsan's user avatar
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4 votes
3 answers
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What is the source of color noise?

Many articles mention color (chroma) noise. However, I cannot find proper information what is the cause of this kind of noise. It looks quite different than the luminance noise, so for this reason I ...
Holiweil's user avatar
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How can a fixed-focus lens have a focus range of 0.5 meters to infinity?

I have a Mavic Air 1 drone and I was wondering how the camera of this drone can have a shooting range as large as 0.5 meters to infinity with a fixed focus? Mavic Air 1 camera specs: Parameter Value ...
Sebastyen Laroche's user avatar
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How is the picture (image signal), acquired by the sensor, shown in a display?

Let's consider a CMOS sensor with N number of pixels. For the sake of simplicity, let's consider an hypothetical Black and White sensor. Each pixel catches the energy provided by the input luminance ...
Kinka-Byo's user avatar
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camera sensor size, crop factor and object "magnification"

I have been reading some things about photography and most make sense, with some exceptions. About sensor sizes, I was reading this nice article where at some point, scrolling down, it says that with ...
MirrorMirror's user avatar
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Why is the reflection of the sensor mount on the sensor having a chamfer

I always see the reflection on the camera sensor having a little chamfer: But the plane in front of the sensor does not have this chamfer, the reflection should be a right angle if it's a mirror: ...
Amarth Gûl's user avatar
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3 answers
308 views

Why do phone cameras have "oil painting" like effect on human skin?

I've long noticed that phone cameras have an oil painting like effect on human skin. As phone cameras get better, the effect is less pronounced by it's still a significant difference from a bigger ...
erotsppa's user avatar
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2 votes
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Could a practical sensor measure time until pixel reaches threshold? [closed]

A typical digital camera sensor operates by capturing the analog state of each pixel after it has been active for some period of time. If some pixels would saturated in less time than it takes other ...
supercat's user avatar
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11 votes
6 answers
2k views

Why should we be interested at incident metering?

Everyone says that incident metering is clearly better than reflective metering because the first one measures the real light on the subject, and not that reflected by its (which depends on its ...
Irhueb's user avatar
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180 views

Why are dedicated light meters supposed to be independent on the sensor?

As I have understood by this question, an exposure value of a certain scenario cought from a digital sensor (CCD or CMOS) results from: the scenario luminance the sensor sensitivity the ISO, shutter ...
Kinka-Byo's user avatar
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Which is the link between a digital ISO value (e.g. 100) and the sensor sensitivity?

There are many questions about ISO (such as 1 and 2), but none of them answers my precise question. My doubt starts from the exposure formula (for instance let's consider it in linear scale): My ...
Kinka-Byo's user avatar
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Why do photos with different settings produce different spots? [duplicate]

I have an issue with my Nikon D3500 camera which I do not understand. I can show it best using two photos I took with different settings. The lens I use is a kit lens which ranges from 18 to 105 mm. ...
Steven Underhill's user avatar
3 votes
3 answers
477 views

How does long exposure work on a digital camera?

I'm curious about long exposure photography and I keep taking sequences of long exposure photos. However, my mind stumbles on this question when I think about my phone camera sensor. How does long ...
Novarino Akise's user avatar
1 vote
3 answers
289 views

Is it true that a camera sensor will never receive an RGB value of R 0 G 255 B 0?

I read this: https://therefractedlight.blogspot.com/2010/09/imaginary-and-impossible-colors.html "there are no green colors whatsoever which do not also stimulate your red or blue cells, or even ...
ACrypticFish's user avatar
1 vote
1 answer
128 views

How to fix Canon EOS 1200D flash release hook making a click click click?

My Canon EOS 1200D was working ok until, suddenly, it stopped showing the display. People suggested to take out the SD CARD and BATTERY for some time. This was done. Now any activity on my part, ...
Sandip Chakrabarti's user avatar
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116 views

Would spectral responses of camera pixels be more "raw", more compact and superior to ICC/DCP camera color profiles? If not, why not?

Background: I'm trying to understand the function of camera color profiles (for raw output) in terms of the hardware. I have found lots of web sites that explain the function of camera profiles from a ...
Sami Liedes's user avatar
26 votes
4 answers
6k views

What causes these squiggly lines in my photos and on my sensor?

(crop showing effected area) Can anybody tell me what has happened to my sensor here? I can vaguely see this pattern on the sensor when I open the shutter and look at the sensor, but it doesn't look ...
Joe's user avatar
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What does the focal length of a fisheye lens mean?

Say an ordinary lens, Sigma 30mm f1.4 for example, is designed for APS-C and thus produces images that have a 35mm-equivalence of 48mm. But what about the fisheye ...
Amarth Gûl's user avatar
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2 answers
109 views

Major color banding on some photos - Pentax k1 mark ii

I have been in Kenya shooting some properties and staff portraits for 2 weeks. Everything has been working as normal until yesterday when I imported my photos from the day and discovered some major ...
CALEY's user avatar
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2 answers
211 views

How do sensors "focus" on the bottom of the lens (flange distance)?

I know that when a camera sensor is used with a lens there is a specific distance between the sensor and bottom of the lens (aka "Flange distance" or "flange focal distance") in a ...
Ray's user avatar
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3 votes
1 answer
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What is read noise?

I recently upgraded from a Nikon D750 to a Nikon Z6 II and came across this graph plotting the read noise (Y axis) against the ISO setting (X axis) of both cameras: As you can see, there is a big ...
Jaap Joris Vens's user avatar
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1 answer
530 views

Camera sensor and sun

I'm a new photographer and yesterday someone told me that I should never point my camera (I have a mirrorless camera) toward the sun as this can damage the sensor. I went back and checked and I saw ...
chickenwingtennis's user avatar
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3 answers
442 views

Sensor pixel size "pixel area" any important?

Using this camera comparison tool i got pr If you look at pixel pitch it shows 5.95 µm and 4.76 µm however for some reason difference they display is 25% when in reality its only 20% What is "...
LilBro's user avatar
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1 answer
453 views

Canon 600D - how to correct sensor tilt and level

I have a Canon EOS 600D which I have modified for astrophotography by replacing the stock UV/IR filter with a Baader BCF filter (this extends the spectral response to >656nm so that Hydrogen-alpha ...
Adrian K-B.'s user avatar
1 vote
5 answers
328 views

Why is an overexposured-area white?

From what I understand, camera sensor photosites have 'filters' on them so that each can receive only either red, blue or green light. Example: When there is an overexposure of only pure blue light, ...
CoolCoder's user avatar
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12 votes
3 answers
2k views

What is this grid-like pattern on the sky in photos?

Some photos of the sky taken on our Nikon D5100 have a diamond-like grid pattern. I'd like to know what may be the cause. The photo was taken in RAW and the pattern appears regardless whether it was ...
Dmitry Chestnykh's user avatar
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1 answer
115 views

Strange pattern on a sensor

I wanted to see if there're any stains on the sensor of my Canon 5D MK3 and I took this shot of a white surface shaking the camera with a slow shutter speed. I keep getting the same image with such a ...
GlebRed's user avatar
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2 answers
647 views

Can taking up-close photos of multiple candles stacked together damage my iPhone’s camera/camera sensors?

My brother took multiple up-close pictures of a stack of burning diyas (a type of candle); to the naked eyes, the candles looked very bright. Can such up-close photography damage my iPhone’s camera, ...
Prince's user avatar
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0 answers
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What is a good explanation for clipping, how it occurs and when it is likely to happen?

Clipping causes a decrease in measured intensity when it's actually saturating. I haven't found a good source for explaining this, and when it should be looked out for, like under what expected ...
user avatar
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1 answer
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Why is it not yet possible to adjust exposure *TIME* in post?

Or, more technically, why can't the values of photosites be read while exposing? As that would allow a camera to store versions of a RAW with varying exposure times ("subexposures" I'll call ...
Aaron Esau's user avatar
3 votes
3 answers
388 views

Random discolored pixel rows

I have recently discovered 5 instances of images where a single pixel row is discolored, kind of what you experience with hot pixels. What I find weird about it is that if I look at the position of ...
John Sørensen's user avatar
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213 views

Capturing Lightning with Pi Camera - Hard purple lines in overexposed area

Can I fix the purple lines in this image in capture processing on my Pi HQ Camera? When shooting long exposures at night, my Pi HQ Camera has purple line artefacts where the lightning strikes, or ...
Steven Wright's user avatar

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