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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11
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4answers
2k views

Where does the light go when a lens with a larger image circle is projected on a smaller sensor?

I am using a full frame lens on an APS-C body. What happens with all the light, that doesn't reach my sensor, but would in a full frame camera? Do manufacturers take special measures so that light ...
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1answer
540 views

How are 16:9 images taken on a sensor with physical dimensions ratio 4:3?

I was using a Zenmuse Z3 (https://www.dji.com/zenmuse-z3) camera mounted on a drone to record HD video (1280x720). However, when I opened it up and verified with the sensor specs (available here - ...
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3answers
3k views

Canon geometric overexposed quadrilateral shapes in all of my images

I've got a Canon 70D that I bought Summer 2015. I've been shooting time-lapse of the construction of my friends' new house, and today I noticed that there is a weird overexposed shape in all of the ...
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7answers
815 views

Achieving film-like resolution, lens requirements?

I am considering moving up to a full frame camera and want to know how my image results will compare to film. According to Kodak, a 35mm film cell has 6000 lines of resolution. Olin Lathrop gave a ...
3
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1answer
114 views

Is this image artifact to be expected and is there a name for it?

I noticed that when I underexpose a subject at relatively high ISO (e.g., 1000) and I adjust the exposure in Lightroom, a slight artifact will sometimes appear. I was wondering if this is normal or if ...
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3answers
1k views

Are thermal imagers inherently more expensive than visible-light digital cameras?

We're finally starting to see practical thermal imaging sensors (microbolometers) entering the consumer market. However, they are still vastly more expensive than comparable visible imaging sensors. ...
17
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3answers
5k views

RAW files store 3 colors per pixel, or only one?

Ken Rockwell says that camera makers consider the individual R/G/B sensors when they talk about megapixels. So the image below would be a 6x6 pixel camera, not 3x3 as you would imagine. If that's ...
0
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1answer
114 views

What happens when pixels cover almost all the area of the sensor?

I think, in this question, one who give an answer has to consider 'pixel size vs pixel pitch'. I read that in some sensors, pixels don't cover the whole sensor and my question is, when the pixels ...
2
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1answer
568 views

In-camera downsampling and ISO-equivalent noise

I have a Sony body with a 24MP APS-C CMOS sensor. It will store images in the following resolutions: 6000x4000 (24MP) 4240x2832 (12MP) 3008x2000 (6MP) When comparing the 24MP and 6MP cases, it's ...
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2answers
2k views

Sensor hangs loose in the body when camera is switched off

I own a Panasonic DMC-G81 (same as G80/G85) with in-body Image Stabilization. When turned on everything is just fine, but when turned off, the sensor is wobbling around in the body. When no lens ...
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1answer
17k views

difference between APS -C sensor and CMOS sensor

I am a newbee to photography and planning to get my hands dirty on DSLR camera, different people come and give difference suggestion. However i am curious about knowing the difference between the APS-...
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1answer
239 views

Why are there two different megapixel counts listed for still images from the same camcorder?

This page about the Sony CX405 camcorder has mentions two different megapixel counts. At the top, 'Approx. 1.71 MP (4:3)' is mentioned as its effective pixel count for still images. But, under '...
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1answer
244 views

Should the sensor assembly on an Olympus E-PL7 move freely when power is off?

I just purchased (new) an E-PL7 as a backup for my aging E-PL6 body. It appears to function perfectly, but when powered off a slight clunking sound can be heard if the camera is lightly shaken along ...
3
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2answers
701 views

Long exposure shots showing huge bright spot. What happened to my sensor?

Recently I noticed the appearance of a quite big spot of increased brightness and strange colour in my longer exposure photos. I'm using a Samsung NX300m (I know, not a good camera for low light...). ...
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1answer
2k views

Strange pattern in picture

I took a picture this weekend with my Canon 450D, and I noticed an area with a strange pattern: What could possibly be causing this? Does it come from the sensor? Feels to me like it's the physical ...
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5answers
8k views

Why don't cameras offer more than 3 colour channels? (Or do they?)

Currently, most (all?) commercially available cameras capture light in three colour channels: red, green and blue. It seems to me that it would be very useful to have a camera with a greater spectral ...
3
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1answer
1k views

How close are digital sensors to “night vision” image intensifiers?

Traditionally reserved for military applications, image intensifier tubes (a.k.a. night vision scopes) are persistently pricey analog devices for amplifying light. For non-military applications they ...
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4answers
33k views

What is the difference between MOS and CMOS?

The Panasonic Lumix DMC-FZ1000 has, according to the specs, a MOS image sensor - while cameras usually have CMOS (or CCD, for that matter). Is there any difference between MOS and CMOS? Or is this a ...
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0answers
53 views

Will 1 Inch sensor give same exposure at same aperture and ISO settings compared to APS-C sensor? [duplicate]

I know that APS-C is many times bigger than 1 inch and it dramatically effects shallow depth of field. But I was wondering if I'll shoot night city for example with same aperture and ISO setting on ...
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2answers
571 views

Faint spots appearing on images

I have a Sony A7s ii that I purchased new from Best Buy. I only have only have one lens, a Sony Vario Tessar 16 - 35mm lens. Unfortunately in video and stills or photographs, there are these two faint ...
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1answer
89 views

What does “sensors with automatic exposure bracketing” mean, and are there such sensors?

Today I encountered the term, "sensors with automatic exposure bracketing", at the website of an imaging, electronics, and software consulting company: Aphesa can also help to deploy software based ...
3
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2answers
297 views

Do colored LED lights produce less illuminance than traditional spotlights?

I'm shooting theater plays and starting to shoot some alternative fashion shows. Many colored lights these days are LEDs, not white + gel as they used to be. Let's simplify things a bit and consider ...
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2answers
137 views

16-bit wysiwyg image? Not RAW [duplicate]

I like the dynamic range of RAW files, but I don't want raw sensor data, but I don't want 8-bit jpegs. What can I do to get the desired result? Request camera manufacturers to allow TIFF file ...
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1answer
315 views

Is CCD vs CMOS sensor the deciding factor between two budget compact cameras? [duplicate]

I'm buying a compact digital camera for travel usage by a person not very good with computers. The purpose is to shoot pictures better than with a phone and nothing else, meaning that it should be ...
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2answers
1k views

How to determine film size from smartphone image exif data?

I took an image from my phone and got its exif data below. It was a samsung note 4, which uses a 35mm film size (24x36) with a 43.27 diagonal. But what I am trying to figure out is the sensor diagonal ...
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2answers
688 views

What does lens resolution expressed in megapixels mean? [duplicate]

In this review of the Nikon D3300 w/ 18-55mm f/3.5-5.6G, Tony Northrup says that because the kit lens of Nikon D3300 is 9 mega pixel, you won't use all 24 mega pixel provided by the sensor. What is ...
3
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4answers
930 views

How much of digital sensor noise is thermal?

Is all digital sensor noise thermal? And what is the relationship between temperature and noise? For example, as we cooled a CMOS towards absolute zero, would we discover that high-ISO images would ...
0
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1answer
756 views

Is there a way to determine a camera's quantum efficiency?

I need to know my camera's quantum efficiency for a research project which involves the usage of a Nikon Coolpix A10. Is there some way to know it?
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4answers
497 views

Why is ISO counted as part of the exposure triangle?

My understanding of ISO is that it is electronic gain from recorded light in a sensor, ie it doesn't actually change the sensitivity of the sensor (because that is dictated by the quantum efficiency ...
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9answers
3k views

Would APS-C be better for shooting wildlife?

Considering the magnification effect of APS-C sensors, they theoretically have to extend the zoom range of telephoto lenses. Accordingly, would it be wiser to use an APS-C camera for shooting wildlife ...
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1answer
1k views

Why is the IR filter present when there is already the Bayer filter on an image sensor?

I have been trying to remove the Bayer filter from the CCD image sensor of my camera. Now I see there's an IR filter before the lens, however I don't understand the point of it because isn't the Bayer ...
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2answers
980 views

What processing is done on RAW files in the camera?

Recently I came across a debate about whether it's fair to call RAW 'unprocessed' or 'unaltered' sensor data of a DSLR. As far as I know, the analog sensor data is processed into a digital RAW file ...
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1answer
228 views

Is it dangerous to use Auto Sensor Cleaning with lens attached?

Straightforward question: Is it dangerous to use auto sensor cleaning when the lens is attached?
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2answers
502 views

Pixels and Subpixels usage in TIFF and RAW

The first answer to this question says that when saving images in TIFF, each pixel holds three colors' data and because of that, the file is larger... and RAW only hold monochrome data in each ...
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4answers
398 views

Can the same sensor have different dynamic range and color depth in different camera makes?

The Nikon D7000 and Sony A55 were found to have the same sensor. But during testing, which I understand is subjective- DxoMark (dubious reputation, I'm aware) revealed that the D7000 has a much ...
3
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2answers
514 views

Canon APS-C: what is the maximum sensor size EF-S lenses are designed to support?

Given that Canon APS-C cameras differ in sensor size (e.g. 70D has a 22,5 x 15,0 mm and 700D has 22,3 x 14,9) is it possible for future models to switch from a 1,6 to 1,5 factor like Nikon crop ...
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2answers
135 views

Image stabilization in interchangeable lens camera body?

Are there any interchangeable lens cameras which have image stabilization in their body too? If yes, does it help more to compensate images's shakiness or will it negatively affect the lens' image ...
3
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1answer
814 views

What does an image from sun-damaged sensor actually look like?

There is obviously a great concern on the Net about getting ones image sensor sun damaged. I am getting interested in what such damage would look like. I have Googled around some to try to find an ...
5
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2answers
334 views

Are there industry standards or specs for image sensor resistance to damage from intense light?

While the occasional snapshot that includes the sun is generally safe, there are certainly combinations of lens and duration that can damage an image sensor if the sun or other sufficiently bright ...
0
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2answers
862 views

How can cameras have the same number of megapixels even when the sensor size differs? [duplicate]

The image resolution for the respective megapixels remains the same whether the camera is of medium format or full frame or APS-C or even mobile phones. However the sensor sizes differ in these ...
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3answers
1k views

Are the stops of the dynamic range of a cameras sensor the same as the stops the light meter shows?

My name is Elefterios and I am studying photography and audiovisuals. Currently I'm on my last year doing my thesis project related to timelapse. On the HDR Timelapse chapter I'm writing a short ...
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1answer
618 views

Will sun damage to a sensor create an unusual amount of noise in images?

Recently I was playing with my Sony α6000 camera, taking some shots of birds in the morning and also the sun. It was after taking the shots that I stumbled upon the fact on the internet that sun ...
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2answers
219 views

Should I be worried about the pixelation in my photo? [closed]

I took a photo of a lake and while editing it I found that the image actually had sensors pixel view all over the picture. Is this something I should worry about? Here in my photo, Pixels of the ...
0
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2answers
100 views

Camera cleaning by professionals or by myself? [duplicate]

My camera has accumulated some dust on its chip over the past 3 years and I want to clean it. Do you have experience with cleaning your camera's sensors on your own with appropriate gear? Do you ...
5
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2answers
949 views

What factors affect the dynamic range of a sensor?

I understand what dynamic range is, but I'm interested in what it is that allows different sensors to have increased dynamic range over other sensors. For example, the classic explanation of a sensor ...
0
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2answers
277 views

How can I use a remote shutter release during IR photography with a D3s without leaking into the image?

I'm using a D3s for infrared photography. I'm trying to use a shutter remote to take the images, but the remote's IR-emitting LED/photodiode is emitting enough light to leak into my image on the ...
2
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5answers
1k views

Why does it seem like large sensors are necessary for good low-light performance?

Phone manufacturers have recently started advertising the size of the photosites on smartphone camera sensors. They argue that larger photosites lead to better low-light performance. I think a good ...
2
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1answer
516 views

How Does A 5D Mk3 Generate The Histogram It Displays In Live View?

What is happening under the hood when a 5D Mk3 displays a histogram (luminance or RGB)? What exactly is the data it uses (raw sensor data, jpeg or something else)?
4
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1answer
1k views

What camera used the largest EXR sensor, and which one offered the largest EXR pixels?

I learned to appreciate Fuji's EXR sensor technology for travel and reporting photography when I used a Fuji X10. But like with all compact cameras, I feel a larger sensor and / or pixel size would ...
5
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3answers
965 views

Why are there black dots on all photos taken with Sony phone?

I took this image with a Sony phone. The lens is clean on the outside. The owner of the phone says those black dots started appearing and supposedly are multiplying. Is it some dust in the insides of ...

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