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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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Why is the sensor size small in D3100 as compared to D3000?

I thought Nikon D3100 must be more advanced than D3000 (because of the higher number and the increased price). But, the D3000's sensor size is 23.6mm x 15.8mm and the D3100's sensor size is actually ...
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How common are hot pixels on new cameras?

How common are hot pixels on new cameras?! I read that people may check up to 5 cameras at stores to actually find a perfect one, is this true? so how commons is this? what is the chance of getting a ...
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Can you use alternative brushes to clean DSLR sensors?

A lot of praise goes to Arctic Butterfly when doing DIY sensor cleaning. However are there cheaper solution to brush off dust by using other non-sensor cleaning specific brushes? Most high quality ...
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263 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 ...
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763 views

What are causes for image sensor getting heated? Does Live View cause more heat?

As I have known so far, image sensor gets heated when being exposed to light for longer time. Is there any other reason why an image sensor gets heated? Does heating depends on sensor type (like CCD, ...
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1answer
221 views

What do “dark current” and “sensitivity” mean for a camera module?

I am looking at a camera module to be used for a project which deals in shooting frames in dark areas and night conditions. This is a camera used from a circuit board. I have the following light ...
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687 views

How are pixel value and intensity related?

How does the value of a pixel at any point correspond to the intensity of light photons striking at that point? Is there any mathematical relation between these two? 1 pixel value = ?? lumen.
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250 views

What settings should be used for self-cleaning sensors?

This question mentioned a self cleaning sensor. I have a few questions in reference to self cleaning sensors. Is there a reason to clean the sensor at startup, shutdown, (or both) automatically? Can ...
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489 views

When is it more suitable to have a full sensor-camera instead of a crop sensor-one?

I've been reading about this a bit, and I get the sense that full sensor-cameras are best suited for shooting landscapes, whilst crop sensor-cameras are preferable for portraits and close-ups. Please ...
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647 views

Can I clean dust from a scratched sensor?

I have a camera with a scratched sensor (a Canon 1Ds Mk II) - can I clean the dust from the sensor? And if yes, how? By using the wet method? Or just by blowing air? The scratch is in the middle. ...
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881 views

Does this look like a sensor problem?

I have these tiny dots in a lot of my pictures. They look like tiny stars. On this Nikon D60 I've tried cleaning the area where the shutter is (what's this called?) with a hand pumping duster, but ...
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405 views

What *exactly* is white balance?

When setting a white balance configuration, we adjust the temperature and green-magenta shift to a wavelength-intensity distribution of light that correlates most closely with the actual distribution ...
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161 views

What is the nature of noise in small-sensor cameras, and can it be overcome in the future?

What is the physical nature of noise in small-sensor cameras? Is it thermal noise in the semiconductor? Is there hope that in a couple of years, noise in small sensors will disappear, and small ...
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5k views

GoPro Hero HD field of view is larger at lower resolutions, how is that?

How is it that the FOV can be greater for the smaller resolutions in their camera, which has no zoom? I would expect a greater FOV when more of the sensor is used. From: ...
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157 views

Why some pixels become hot pixels?

What is the physical explanation to hot pixels? What happens to the sensor when a good pixel become an hot pixel?
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614 views

Convert RGB camera to infrared, but 3 channels not just 1?

A common way to make an infrared camera is to remove a commodity camera's IR-blocking filter (and add another filter to block the visible spectrum). Is there a similarly cheap way to convert an RGB ...
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2k views

Can the “Dust Delete Data” function on Canon DSLR be used with Lightroom?

My camera is 6 months old and I noticed there is quite a few spots on the sensor (especially when taking HDR shots of bright scenes or the sky) The hand blower does not lift these particles off the ...
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How linear are DSLR sensors?

To be more precise, let's say we are taking a W&B photograph. Picture 1 : And let's say we take it once with a 1/1000 shutter speed, so that the values for R/G/B range from 0 to MAXVALUE / 2 ...
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Is small sensor always a bad thing?

I own a DSLR. I want to buy some not-too-expensive compact, and there are a lot of compacts in the range 100-250$ with 1/2.3" sensors. Can such a sensor/camera set give a quality somewhat comparable ...
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573 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 ...
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What is Snapsort's true resolution?

On Snapsort I found this explanation: True resolution Manufacturers advertise high megapixels to sell their cameras, Snapsort calculates the true resolution of each camera based on the ...
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566 views

What is this dead pixel problem really called?

On all photos from my last vacation I see this red point. It appears on in-camera JPGs as well as on RAW files. A see a red pixel in the same position on all pictures. How is this problem called? Is ...
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How does a sensor cause vignetting?

Vignetting is usually assigned to lens characteristics, or caused by light-blocking objects in front of a lens, like lens-hood or a filter. Is there vignetting (or vignetting-like effect) caused by ...
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523 views

Does the Nokia Lumia 920 truly present any significant advancements in cameras?

Nokia is touting the new Nokia Lumia 920 as a breakthrough on many fronts for digital photography, even going so far as to say that it can achieve DSLR like results. Of course one of the things that ...
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287 views

Why does the Pentax K-01 have less DR than the Pentax K-5?

I thought that the K-01 and the K-5 both sported the same sensor, but checking their specifications in Snapsort I found that their Dynamic Range is different by a little bit more than 1 EV (12.9 EV vs ...
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What is the effect of long exposure on file size?

Is it a rule that long exposure will produce a larger size file compared to a shorter exposure? It seems logical, since you are writing more data to the memory card when you expose for more time. ...
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Why is on sensor PDAF drastically slower than traditional PDAF?

Why is on sensor PDAF drastically slower than traditional PDAF? I assume the technology is the same, doesn't matter if the module is on the sensor or located behind a mirror. But the performance is ...
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Can condensation be formed in the camera sensor?

When entering a hot place after leaving a cold place, some condensation can be formed in the lens and manufacturers recommend you to avoid using the equipment in this state. So, if condensation can ...
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What causes banding noise?

I'm looking for information (and references) on three related topics: What causes banding noise in CMOS sensors? What is the physical/technological cause? Is the cause the same in CCD and CMOS ...
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767 views

How to show Sony NEX F3 image quality is better than Nikon 1 J1?

According to this site, Sony NEX F3's sensor is 3x as large as Nikons, and it's image quality is 73 vs Nikon's 56 (how on earth do you come up with a number for this?). I have been experimenting with ...
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What is the structure of a photosite?

I know that sensors are made from several (million) photosites. But what is in the photosites? What chemicals, if any? How are they made? What actually detects the light? I am looking for both CMOS ...
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168 views

What is the benefit of the sensor marker?

I know that this marker on my Canon EOS shows me where my sensor is: Form technical point of view this is interesting, but is there benefit for me as a photographer to know exactly on which level ...
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156 views

Can lens stacking cause sensor damage?

Can damage be caused to a camera's imaging sensor (any size) simply by reversing, or stacking, lenses? Would stacking lenses cause a concentration of light to strike the sensor and perhaps damage ...
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427 views

Is “Ultrapixels” just marketing or is there a real benefit?

HTC has branded the sensor in its new phone (the HTC One) to be "Ultra pixels". For the same sensor size it only gives you 4MP where today's standard for top of the line smartphones is 8MP and up. Of ...
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911 views

what's the relation between sensor size and image quality (noise, dynamic range)?

I'm reading this description on sensor size: Digital compact cameras have substantially smaller sensors offering a similar number of pixels. As a consequence, the pixels are much smaller, ...
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461 views

Shooting images smaller than the sensor size

I have a d600 and I appreciate very much the high resolution I get (useful especially for landscapes), but for most other subjects I find 6000 x 4000 to be overkill, making post-processing ...
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1answer
261 views

Are the perspective control advantages of a tilt shift lens less important on higher resolution cameras?

When using a tilt shift lens for perspective control, you can use shift to help account for converging lines such as in a scene of a church from 100ft away. I can also handle this type of perspective ...
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Does Stopping down affect the performance of the sensor's AA filter?

I noticed a while back that with a lens stopped right down (say f16-22), any dust on the sensor becomes much more noticeable and "focused", and wide open (say f1.4) it is practically invisible. This ...
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657 views

What are the right cleaning tools for an APS-C sensor?

I have got my gear ready for a long holiday in next month, but I'm pretty much confused when it comes to having the right tools for cleaning a sensor. The typical procedure I have experienced from ...
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159 views

How is shots per second of a camera is measured?

I was just curious to know what are settings used in testing the camera's shots per second?Especially the shutter speed. Whether its set to the camera's maximum capability or any standard shutter ...
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337 views

The Lowdown on Image Quality on DSLRs

I have seen sites that use measure DSLR performances with Image QUality (in numbers). So I was thinking, given a D800 and a D7000, with the same lens, the same lighting condition and many other ...
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159 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 ...
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613 views

Assuming a perfect sensor, what is the physical limit of ISO/pixel area?

Assuming that camera manufacturers can eventually make the perfect sensor that introduces no electrical noise to the signal, at what point (measured in ISO/area of a pixel) will shot noise be so ...
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797 views

Canon 1Ds Mk II's scratched Low Pass filter. Now what?

Besides our workhorses (Canon 5D3 and 60D), we have an old camera - Canon 1Ds Mk II which has its OLPF scratched. That is, the camera works (ok, more or less because the signs of time are present on ...
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Sony NEX5: Why do I have a dark spot in my images? [duplicate]

When I look through the display, I see always a small grey circle at the same place. Also in the picture it's the same circle. When I change the lens, the circle is still there. So I assume it's ...
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243 views

Can exposure be bracketed by many sensor readouts during single exposure?

I am getting into some HDR photography and was thinking of a new ways that camera manufactures could help us in capturing HDR pictures. Say you want to capture three image and you have a constant ...
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131 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 ...
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764 views

Background blur vs. frozen object in long exposure flash photography

I recently watched Adorama's video on rear curtain sync flash photography. At 4.12 to 4.42, the presenter claims that when using front-curtain sync, the background/long exposure blur will be put on ...
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440 views

How to clean spit off my camera sensor?

A short while ago, I [foolishly] attempted to clean some specs of dust from the sensor of my camera by blowing on it. While this was successful in removing the dust, I inadvertently spat on the ...
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562 views

Why is there a vertical lines pattern in noise?

Take a look at this image (shot with a Nikon D60). The shadows have been aggressively brightened to make the noise clearly visible. If you look closely, you'll see that the noise is not completely ...