India Point Park

India Point Park
by matt-ball                

Submit your Photo
Hall of Fame

Please participate in Meta
and help us grow.

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.

learn more… | top users | synonyms

1
vote
5answers
152 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
votes
1answer
139 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)?
0
votes
1answer
54 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
votes
2answers
836 views

Black dots on all photos

I took this image with a phone (some Sony). 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 ...
2
votes
3answers
164 views

If I set my camera to lower resolution, does that mean more sensor area per image pixel?

My camera is the Nikon D3200 and the specs state that it has a Sensor Pixel Area of 14.85µm2 @ 24MP. When i set my camera to JPEG (fine), I have the ability to set the picture size. Would setting it ...
1
vote
4answers
152 views

How does “crop factor” relate to the area of a sensor compared to full frame?

What is meant when someone says that a 1/2.3 sensor has a crop factor of 6.22? How many times the area of a 1/2.3 sensor is a full-frame sensor? Please include plenty of details. Another ...
0
votes
1answer
52 views

Why the photos captured from my mobile camera doesn't give a same results in same conditions?

Last night I was trying to create a time-lapse of the Orion constellation. Setting all the camera settings to manual (max ISO my mobile camera allows 1600 , shutter speed 1 sec), I was trying to ...
0
votes
4answers
132 views

Why do camera manufacturers advertise image processors but not the sensor itself?

Camera manufacturers often advertise their image processors version in advertisements, such as DIGIC 6 (Canon), EXPEED 5A (Nikon) and many more. But we never see they advertise the sensor they are ...
16
votes
3answers
1k views

Why do electronic shutters expose row by row?

This question connects with my previous question, Why do cameras use a slit between two curtains rather than exposing the entire sensor instantly? This question is about why the slit thing comes with ...
0
votes
2answers
63 views

photographing a full moon [duplicate]

I have photographed the moon zoomed out to 500mm or so with my Lumix FZ150 when the sky is not very dark and have successfully captured terrific detail in the moon's features. However, when trying to ...
3
votes
4answers
295 views

Why do cameras use a slit between two curtains rather than exposing the entire sensor instantly?

Why is it more effective to use "a slit travelling from top to bottom of the sensor" in faster shutter speeds, rather than exposing the entire sensor instantly? And the slit thing only comes in fast ...
2
votes
1answer
204 views

Real world Dynamic Range

I am confused with the science of electronics, regarding cameras and sensors. I have read the posts and answers here and elsewhere. All I walk away with is the electronic specs of cameras and sensors. ...
0
votes
2answers
120 views

Effective focal length of kit 16-50mm lens on A6000 (APS-C 1.5x crop factor) [duplicate]

This is likely a tedious question for you guys but, as a camera noob, I'm miffed, so please bear with me. I have a: Sony A6000 (APS-C 1.5x crop sensor). With kit lens: SELP1650 lens (16-50mm) So, ...
3
votes
1answer
80 views

Sony Full Frame E Mount Sensor Corners

Context I've seen the Canon 5D Mark III, Nikon D750 and A7R before. The sensor placement of the Nikon and Canon reveals the whole sensor if you look "down" the mount on the camera. On the A7r though ...
1
vote
2answers
120 views

Does A RAW file exist containing the full dynamic range of a natural scene with a ratio of 100,000:1?

I've just read Karl Lang's excellent whitepaper - Rendering the Print: the Art of Photography. In it, he mentions that the ratio of light to dark in a 'natural scene' can have a ratio of 100,000:1, a ...
8
votes
2answers
182 views

Horizontal banding pattern near sun: sensor flare?

Following is a crop from a RAW shot, developed in Lightroom 5.7, into a setting sun from a Sony A77II – ISO 100, f/5, 1/20s, with a TTL fill flash. In the darker regions near the sun a series ...
1
vote
2answers
179 views

Why is FF sharper than crop body for the same framing of the same object?

Take an FF body and a crop body, with similar MP rating - and the FF body will give a sharper image of the same object. At least, that seems to be the case - as here: ...
5
votes
2answers
313 views

Are these spots on the sensor or the lens? [duplicate]

Equipment is Canon EOS 5D3 (5760x3840) with a 24-105 f/4 L lens at 105mm, ISO 200. The following are crops from the same small (676x449) section of a couple of blue sky shots I did to test for sensor ...
1
vote
3answers
117 views

What causes noise floor in an image sensor?

In the book Image Sensors and Signal Processing for Digital Still Cameras, it says that Read noise, or noise floor, is defined as noise that comes from the readout electronics.Noise generated in a ...
0
votes
1answer
193 views

What is the sensor inside NIKON D3300?

Looking for a DSLR with Sony sensor inside, NIKON uses Sony EXMOR CMOS sensor in their DSLR. But there is no confirmation about what is the sensor used in NIKON D3300.
5
votes
1answer
374 views

What camera companies make their own sensors?

Is it public knowledge what manufacturers make their own sensors and what import it from others? I heard somewhere that Sony manufactures Nikon's high end sensors, but don't know about the others. ...
0
votes
1answer
260 views

Using a full frame lens on a crop sensor camera [duplicate]

I have a Canon 70D APS-C sized sensor camera. I currently have a Sigma 10-20mm, a Canon 50mm 1.8, a Canon 75-300mm and of course the kit lens. I want to buy the Canon 24-105mm F4 L as an upgrade. I ...
2
votes
2answers
79 views

Is the anti alias filter really a blurring filter?

I'm trying to dig into the nature of how the anti aliasing filter works. This is of importance to me as I need to capture small details at the very edge of the resolution limit of the cameras lens as ...
0
votes
1answer
83 views

How does ISO setting change CCD/CMOS sensor behavior? [duplicate]

In order to understand the technology in a digital camera, I considered the following question: How does ISO setting change CCD/CMOS sensor behavior? For example, does ISO setting affect the amount ...
5
votes
1answer
292 views

In terms of “image quality”, is the sensor the only spec of a DSLR I should look at when shooting RAW?

There are so many specs which don't have any influence on your RAW file. I'm trying to isolate the factors that matter for image quality only. For example, I'm not sure about the processor : of ...
1
vote
1answer
73 views

Blur each pixel independently on sensor to reduce moire effect

If I understand correctly, sensors can produce a moire effect because their subpixels are separate (each one is affected by a different portion of the image), so to stop this effect, some cameras have ...
8
votes
1answer
177 views

How is a Bayer filter manufactured?

Following on from an earlier question about bayer filters, it got me wondering: How are they actually manufactured? How do they apply such a small amount of dye to each sub pixel? My best guess ...
0
votes
1answer
154 views

Exmor RS. What value does it add to an 1" sensor?

Recently, new versions of Sony P&S cameras (DSC-RX10 II, DSC-RX100 IV) have emerged. They feature new 1" stacked CMOS image sensor called Exmor RS. I understand that this technology increases the ...
0
votes
6answers
297 views

Why does Sony say that a 35mm lens is “35mm equivalent when used with an APS-C camera?”

I'm thinking of getting a Sony A6000 with a Sony SEL35F18 Lens. I'm a little confused about the actual focal length (and/or field of view) of the lens when attached to an APS-C sized sensor. The ...
1
vote
0answers
61 views

Quilted/Tiled Image Sensor: How do you eliminate stripes of missing photos in huge quilted sensors?

Background: This question is largely inspired by one of the answers in: What limits the size of digital imaging sensors? So the answer mentions uber-large image sensors that are made by "quilting" or ...
1
vote
2answers
124 views

What is it called when a camera generates files with more megapixels than the actual sensor provides?

I found in many Android devices that the "real array size", which is the actual pixel count of the camera sensor, is lower than the 4:3 Max picture the user can take. For example: Sensor Array = 1616 ...
1
vote
1answer
162 views

Will black level of one sensor reduce its dynamic range?

For one camera, the black level of the sensor will make the output non-zero when it is covered. For example the output of the sensor is 10bit and black level is 63, if the output is reduced by black ...
3
votes
1answer
184 views

How close are we to the sensor pixel size limit?

Given the wavelengths of light we see, presumably there is some limit of pixel size below which we cannot resolve – i.e., packing four pixels into the area of one pixel would not be able to ...
2
votes
2answers
281 views

What makes the Foveon X3 a “direct” image sensor?

In marketing materials mentioning the Foveon X3 sensor, I usually see it referred to as the "Foveon X3 direct image sensor" (example): I understand how the Foveon X3 sensor works (stacked ...
7
votes
1answer
144 views

What's the point of a shutter when the sensor is clearly working all the time to provide live view?

Something I don't understand about compact digital cameras is how their shutters work. On the screen at the back of the camera, a preview is constantly shown. I assume this preview is made by light ...
4
votes
3answers
235 views

What are the RGB primaries in a camera?

More generally, what is the nature of the gamut? Primaries as peak sensitivity don't behave the same as primaries for mixing output. I suppose this is necessary to know for RAW importing and would be ...
1
vote
2answers
307 views

Which sensor “full frame” vs. APS-C (1.6 crop) gives more distortion?

Which sensor "full frame" vs. APS-C (1.6 crop) gives more distortion using the same lens? I mean, would a 10mm lens on a full frame camera show more or less distortion than if it were on an APS-C (1.6 ...
1
vote
3answers
226 views

Will a macro extension tube eliminate the cropping of an APS-C lens on a full-frame sensor?

I understand using an A-mount lens intended for APS-C sensors on a full-frame camera results in cropping of the image. According to a tech at Sony, you lose 1/3 of pixels (APS-C is a 2/3 sensor so it ...
0
votes
1answer
154 views

What causes chroma noise in an image sensor

I'm trying to understand what is causing chroma noise in an image sensor, specifically why it is so visible when the ISO is set to a very high value (which for CMOS I guess means that there is an ...
1
vote
1answer
138 views

Imbalance in green pixels

Question in brief: at a sensor level what are the typical causes of an unequal response between adjacent green pixels? Background: I'm experimenting with a sensor, which is typically deployed in the ...
2
votes
2answers
255 views

What determines the fastest shutter speed for an electronic shutter?

I tried my luck over at Robotics but didn't have any luck finding somebody knowledgeable. Somebody therefore suggested to post the question here again. I understand that there are different types of ...
1
vote
1answer
89 views

Does sensor type affect image quality? [duplicate]

I've recently discovered snapsort.com and use it to compare other cameras with the one I own. When comparing Pentax k10D with the K-x model I learned that the K-x has a CMOS sensor and that ...
3
votes
2answers
263 views

How is the spectral response of a camera typically measured?

I cannot find any resources that detail a standardized method of measuring the spectral response of a camera. Does such a standard exist? Does anyone know how to do this? To give some context, I'm ...
0
votes
2answers
259 views

How is data in a camera's colorspace transformed into XYZ or a standard RGB space?

I have a canon 600d that says it uses sRGB. How is this even possible without having the same spectral sensitivity spectrum as a standard observer? It is possible to define the matching functions of ...
0
votes
0answers
29 views

How risky is removing the Hot Mirror Filter (IR Filter) from a DSLR's sensor? [duplicate]

I recently stumbled upon an astro photography tutorial which involved photographing the 'Milky Way' I was told to remove the IR filter (Hot mirror) from the sensor for better results, as it blocks ...
4
votes
4answers
704 views

Why does BRIGHT red in direct sun come out orange?

I was at the NEC today dropping off a car for an auction, and took this quick photo (no intention to use for anything so no attempt at composition!) This was taken on a LG Nexus 5 mobile phone. I ...
0
votes
1answer
166 views

What is this yellow mark I get on dark photos?

I'm using a Nikon D3200 - new to photography. Whenever I take photos of the night I always get this yellow mark in the same spot. I thought it could be a dirty lens so I cleaned it with a microfiber ...
3
votes
1answer
120 views

How fast does a sensor cool down sufficiently after a long exposure?

If I am taking long exposures for star trails how long should I wait between exposures to allow the sensor to cool down?
0
votes
1answer
117 views

can you remove a hair on the image sensor in light room?

i took a series of pictures yesterday and discovered that shooting around f/13, f/16, there is what appears to be a hair located on the image sensor and is visible in the pictures where the lens is ...
0
votes
1answer
63 views

Low-light photography: How much light reflects off a surface

I'm looking at light levels for photography and I'm trying to figure out how much light hits my sensor. There are plenty of tables online which give light levels, but that's only directly relevant if ...