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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3answers
306 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 ...
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98 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 ...
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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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2answers
99 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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3answers
4k 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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2answers
173 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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1answer
88 views

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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1answer
50 views

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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0answers
120 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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4answers
167 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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1answer
155 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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1answer
130 views

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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1answer
190 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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1answer
128 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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4answers
374 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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1answer
122 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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2answers
177 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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2answers
408 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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3answers
123 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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1answer
67 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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2answers
392 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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2answers
650 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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1answer
88 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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1answer
60 views

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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1answer
63 views

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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3answers
684 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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1answer
392 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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2answers
616 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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1answer
192 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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3answers
61 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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1answer
112 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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2answers
1k 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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2answers
236 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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1answer
111 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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3answers
650 views

Bayer color effective true resolution [duplicate]

Because in a typical digital camera, each pixel records only one color though use of a Bayer filter or similar mechanism to achieve color vision, the true resolution of a ## megapixel sensor is ...
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4answers
868 views

photon counting with a DSLR

I'm quite new to photography, but was wondering what settings I should have in order to have a good approximation of the relative number of photons that creates each pixel? i.e. best settings such ...
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1answer
132 views

How to calculate a sensor size when all I know is focal length and resolution? [duplicate]

A lot of the related questions require variables that we simply do not have. I would like to calculate sensor size for a video camera. We have focal length and resolution but I do not know the field ...
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3answers
405 views

Is it better to shoot at diffraction limited aperture or sharpest lens aperture?

In the old cameras like Nikon D80 with 10 Megapixel pixel count. The diffraction limited aperture is F/13 but its known that lenses are generally sharpest at the F/8 so it's a no brainer to shoot at F/...
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3answers
340 views

Reason for offset in lens/sensor and tripod mount?

I have noticed that my Canon Powershot G11 tripod mount is more in the center of the body of the camera and not aligned with the lens/sensor. Is there a reason for this? My concern is that as I rotate ...
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1answer
161 views

Why was JFET-LBCAST such a short lived sensor technology?

I have been reading Wikipedia for a while and I realized Nikon developed this technology for a long time for their top of the line DSLR's and then abandoned it in the favor of the CMOS sensors. But ...
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2answers
119 views

Is Sensor Noise Consistent Between Cameras of the Same Model?

The RAW photo editing program Darktable has a "Denoise - profiled" filter which reduces image noise by using a noise profiles for your camera model and ISO submitted by other users: The darktable ...
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2answers
273 views

Is diffraction limited aperture independent of lens?

I have always understood diffraction limited aperture as a property of the camera and its sensor, not of the lens. The camera has a certain sensor size and a certain megapixel count, which together ...
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1answer
106 views

Why do I get pinkish tint on some photos in DJI Mavic 2 Pro hyperlapse?

I tried to take a twilight hyperlapse with Mavic 2 Pro. However, there is a pinkish tint unevenly distributed randomly in the shots: Needless to say, all images have the same settings (as part of ...
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3answers
101 views

How do I use a container of sensor cleaning fluid?

I purchased Visible Dust sensor cleaning kit, but don't know how to use ampoule in which cleaning fluid is contained. Instead of screw cap there is snap-on cap with stick protruding into fluid, in ...
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2answers
274 views

Is 24MP actually matched to Full-HD Resolution when factoring in the differences on how pixels are defined?

Naive assumption: 24MP sensor vs a Full HD monitor of 2MP, sensor has much more resolution. Second look: You sample something that is not synchronous to your sampling raster/clock, you need to ...
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1answer
84 views

Lumix G85 - Black Corner regardless of lens and no hood - please help

I have owned a Panasonic Lumix G85 for about a year. This month, I've started getting a black area on the left corner of my images, which you can also see on the EVF. I can't see anything on the ...
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1answer
101 views

Ghosting artefacts in narrow DOF photographs

Snapping with a Canon EOS 600D in narrow DOF situations (for example with low f-stop numbers at long focal lenght), I get ghosting artefacts on the parts of the photograph which are out of focus. ...
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1answer
186 views

Why is my dSLR giving me an incomplete image?

I'm shooting with a gently used Nikon D70s (with roughly 15k clicks) and a newer Nikon AF-S Nikkor 55-200mm ED VR lens. The lens works fine on other cameras. The memory card works fine on other ...
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0answers
39 views

Are any common (optical) filters useful to attenuate overwhelming blue spotlights in live music situations?

Strong blue spotlights as typically used on outdoor stages are often so physically bright (which I guess they have to be, given how viewers perceive blue as very dark) that they provoke channel ...
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0answers
272 views

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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