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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Flash release hook doing click click click

My canon eos1200D was working ok till suddenly it stopped showing display. People suggested to take off the SD CARD and BATTERY for some time. This was done. Now any activity on my part, be it ...
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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 ...
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25 votes
4 answers
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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 ...
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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 lens? From Wikipedia, it is said that ...
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2 answers
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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 ...
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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 ...
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162 views

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 ...
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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 ...
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3 answers
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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 "...
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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 ...
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1 vote
5 answers
174 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, ...
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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 ...
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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 ...
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2 answers
258 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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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Sensor resolution and ISO performance [duplicate]

I keep hearing that less megapixels = better ISO performance, because larger pixels capture more light Suppose I shot something with a 4MP sensor and then downscale it to 1MP (4-to-1 pixel binning?)....
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1 vote
2 answers
130 views

How are focal lengths derived from camera calibration (resectioning) and pixel sensitive area related?

In camera calibration (camera resectioning process, e.g. camera calibration with OpenCV) does the result for focal lengths fx and fy depend on the photo-sensitive area inside the pixel ? If I have a ...
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26 votes
3 answers
5k views

What's the point in covering the viewfinder?

Recently, I found out that the rubber cover on the strap of my Canon EOS camera is used to cover the viewfinder. I searched on the web to learn why should I cover the viewfinder and I read that it ...
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2 answers
579 views

confusion about the principle of on-sensor PDAF technique

There are a lot of pictures over the internet illustrating the principle of phase detection autofocus, such as this one https://www.androidauthority.com/how-pdaf-works-1102272/ The simplest way to ...
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1 answer
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Spots on LCD of a Blackmagic pocket cinema camera

I bought a used Blackmagic pocket cinema camera last week. It was ok then I noticed a few green spots on LCD 3 days ago(bottom part), and today I noticed it grew bigger and also I noticed a new lines ...
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1 answer
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I have a white and pink line on my LCD screen

I was shooting a wedding video for a client and during the reception they had lasers where the DJ booth was for the dancing. As I was filming for around 25 minutes I realized that all of a sudden I ...
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1 vote
0 answers
170 views

What is the cause of these colored dots?

I recently bought a used Canon 6D with the 24-105 f/4 L USM kit lens. After shooting some outdoor pictures at night, I noticed some colored pixels or dots in the images, especially at longer exposures ...
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4 answers
349 views

Sensor size and pixels amount impact on image quality

Digital cameras have two characteristics: sensor size and pixels amount (in MP). I know the bigger sensor is and the more pixels amount is the better for the final image quality. But what ...
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2 votes
1 answer
215 views

Sensor Scratched/Marks

I need some feedback on what these marks might be. Iso: 100, Aperture: f22, Shutter: 1/8. Applied "DEHAZE" in Lightroom so that the you can see the lines clearer. Ignore the sunflare to the ...
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1 answer
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I want to photograph in low light settings and make 11x15 enlargements, current smartphone not adequate

I have $350 US dollars to spend and was looking at new smartphones with top criteria being picture quality (have newborn, need pics). However, I read even sub $200 cameras have better performance than ...
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0 votes
1 answer
236 views

Did sensors improve in the last 10 years?

I have a Sony SLT-65 and consider getting a new mirror-less APS-C camera. What can I expect from sensor development of the last 10 years? E.g., does the Fuji X-T1 offer better quality in low-light/...
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1 vote
1 answer
296 views

Full Well Capacity Questions

As I understand it, there are two potential limiting factors on full well capacity. a) adc bit depth and gain, b) pixel size and ability to absorb photons Whichever is the smaller value (in electrons),...
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4 answers
390 views

What image will I get if I attached a DSLR lens to an iPhone sensor?

As we all know, we will get a cropped image when we use the same lens on FF and APS-C. The image is kind of zoomed-in. THe image quality of the two images would depends on the sensor quality. If I ...
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3 votes
1 answer
220 views

Sensor damage due to overheating?

I have recently got a Fuji X-T4 and did some overheating tests in various 4k video modes. I repeatedly overheated the camera without a break to see where the limits for video shooting are. I know that ...
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2 answers
395 views

Is there any difference in distance from Sensor to the lens (first glass) when we compare Sigma 24-70 2.8 and Sony 24-70 2.8?

I am looking to buy a 2.8 lens, I heard that Sony's lens is more closer to the sensor. Is that true ? Why I am asking this because, I heard (not sure) that one advantage of mirrorless camera's are ...
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3 votes
2 answers
641 views

Can I damage my camera by shooting directly at a lightbulb in the ceiling?

I got my first dSLR, a Nikon D3500, a few weeks ago. Today I was trying out manual mode and for some reason I thought it would be cool to shoot pointing directly at the lamp/lightbulb in the ceiling ...
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3 votes
3 answers
127 views

Transition between different film/sensor generations

During the history of photography, there has arguably been no component which has improved as much as the medium which records the light. The mainstream has gradually moved from glass plates, to 5x4&...
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1 vote
1 answer
97 views

Saturation Capacity and ADU

I'm having similar issues understanding the relationship between full well capacity and gain as shown in this question here: Reconciling gain (e/ADU), full well capacity and ADC bit depth The ...
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3 votes
2 answers
529 views

What interval between photos is recommended for shooting meteors?

I plan on shooting the Perseid meteor shower in one of the next nights (probably August 11-12). It is my first time (purposely) taking photos of meteors. I will be using my 18-55mm kit lens (this is ...
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3 votes
2 answers
680 views

What is the bokeh difference between 1/2.3" f/0.95 cell phone and 1" f/1.8 compact camera?

I am thinking of buying a Sony RX100 (mark i). The thing is, I am gonna use it for pet, flower photography, and I really like the f/0.95 lens on my cell phone camera. It produces creamy bokeh with 1/...
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3 votes
1 answer
91 views

Can someone help me identify what's on my sensor?

I saw some dirt smudges on my photos the other day, so I decided to take my camera to a shop where they cleaned the sensor. The problem actually got worse, as the number of smudges increased and the ...
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If sensor resolution numbers increase significantly from 12.1 MP to 50.6 MP, why's actual difference in horizontal width much less pronounced?

I don't understand the embolded phrase below from Camera Resolution Explained. Please explain like I'm 10. I'm unschooled at photography or physics. How's "the actual difference in horizontal ...
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1 answer
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a6400 Red circle (light / flare) when getting close to darker subject

I run into a little issue today and can’t figure out the root cause. I have the a6400, when I get close to a subject, mostly black / dark fabric type of material, I will see a red dot (light / flare) ...
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2 votes
3 answers
949 views

Does lower resolution result in better signal-to-noise ratio, given the same sensor size?

With the release of the Canon EOS R5/R6, there have been many saying that they prefer the 20MP R6 camera over the 45MP R5 camera, due to its lower price but also because of "better low-light ...
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5 votes
1 answer
426 views

Camera suddenly sees much less than usual

I've been out taking pictures all day without any real problems. After getting home I wanted to take one last quick shot, in that moment I realized my camera was struggling to turn on, after a while ...
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5 votes
2 answers
850 views

Does cleaning the camera sensor affect its autofocus capabilities?

I cleaned my dirty sensor of nikon d3400 few days back and the dirt spots are gone now. But a random thought came to me which is troubling me now. I wanted to know if cleaning the sensor could alter ...
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5 votes
1 answer
210 views

Sensor spot/dust testing - should test shots be exposed to the right?

I recently bought a new camera and have been doing some sensor spot/dust testing. In some sites/guides/videos, aside from the usual setup (ISO 100, F/22, focus to infinity, shoot at a blank white wall,...
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3 answers
64 views

Electronic shutter - what controls it?

From what I've read thus far, electronic shutter is a type of device that controls whether the image sensor is turned off or on non-mechanically. What exactly controls it and how does it turns the ...
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1 vote
1 answer
141 views

Is my sensor dying?

Please check this 100% crop of a night sky. I shot this on a Nikon D750 with a Nikkor 50mm f/1.4 D @ f/8, ISO 100, RAW format. I had already noticed that kind of noise / hot pixels (all these small ...
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4 votes
2 answers
2k views

pixel binning vs higher individual pixel size

Some smartphone cameras support pixel binning, to switch between high-res and low-light modes. An example would be the S20 ultra, which has an 108MP sensor that can bin pixels on a 3x3 grid, leading ...
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1 vote
2 answers
587 views

What covers a sensor, and what can we clean it with? [duplicate]

What can we clean camera sensors with? Generally googling returns 'ethanol'. Various people use ethanol for the job. What else can we use? Isopropyl alcohol, perhaps, eye glasses cleaner? The ...
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1 vote
1 answer
129 views

What causes this kind of sensor spots, and how do I clean it? [duplicate]

I get this spot in my images, on Sony A7III shot data: 0,8" second, F/36, ISO3200. Focused at closest point. Full Frame: Frame crop: As seen here, the spot is caused by dirt on the sensor: I ...
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