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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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199 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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2answers
472 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 ...
5
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1answer
526 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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1answer
820 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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2answers
4k 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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2answers
138 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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2answers
275 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 ...
5
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1answer
1k 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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6answers
2k views

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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3answers
613 views

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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2answers
445 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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2answers
759 views

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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2answers
211 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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2answers
341 views

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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3answers
360 views

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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1answer
701 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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1answer
144 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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2answers
2k views

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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1answer
148 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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2answers
407 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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1answer
633 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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3answers
337 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 ...
4
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1answer
244 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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2answers
105 views

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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1answer
474 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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2answers
138 views

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

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

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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3answers
141 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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2answers
322 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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2answers
493 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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2answers
2k views

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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3answers
575 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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4answers
3k views

Sony NEX5: Why do I have a dark spot in my images?

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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2answers
468 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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4answers
227 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 ...
3
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1answer
222 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 ...
3
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1answer
381 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 ...
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2answers
1k views

Can video shooting have a negative effect on a DSLR sensor?

When compared to shooting still photographs, does shooting video have any negative effect on DSLR sensors? For example, I wonder if shooting video may produce more heat, which might be harmful for ...
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2answers
1k views

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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2answers
945 views

Nikon D5100 half bright-half dark image with horizontal thin black line

I am getting half bright-half dark image with horizontal thin black line on my Nikon D5100. Does anyone has any idea ? i am extremely worried. Warranty just expired. I have sample images uploaded at ...
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2answers
240 views

Does high reflectiveness of digital sensor lead to poor lens performance?

I Googled film vs dslr and found an article from 2007 that said: Digital sensor has higher reflectiveness than film. The light bouncing back from sensor will cause flare and lead to poor optical ...
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2answers
133 views

Are these weirdly-shaped purple stains really from particles under the first layer of the sensor, and if so, what can I do about it?

I have those little particles on my pictures. There are a lot of them, as you can see, and they have different weird shapes: I already sent my camera for a sensor cleaning and the guys at the shop ...
3
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1answer
347 views

Could a damaged sensor cause stripes on the image?

Today I discovered that my camera has started to save pictures like this: But, when I use the camera viewfinder, everything looks fine, both via LCD and via the EVF. I thought it could be the SD ...
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0answers
102 views

Why is there a grid pattern of darker pixels in this twilight sky flat field? [closed]

This is the first time that I'm really inspecting the calibration images we were taught to take/use during data reduction, and I've noticed something in all the flat fields. The image below clearly ...
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6answers
357 views

Why don't sensors have a wider aspect ratio?

than 3:2, like 16:9 or 16:10? Given the popularity of widescreen TVs and computer monitors with wide aspect ratios, and that most photos are viewed on a screen, rather than printed, and that the eye ...
2
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2answers
271 views

How does sensor size relate to image resolution?

How is it possible that with a particular sized sensor (say APS-C) it is possible to get different sized image cameras (by this I mean a 10 megapixel camera, a 15 megapixel camera etc)? Where does ...
2
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3answers
429 views

Which camera/lens combination achieves the highest possible image quality for macro?

Doing lots and lots of research I have a hard time time finding the ultimate answer to this question. I would like to shoot macro and products and aim for maximum sharpness and reproduction. Maximum ...
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2answers
305 views

What is the meaning of “cropped sensor”?

What is the meaning of the term "cropped sensor"?
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2answers
601 views

Dust on the sensor, should I be worried?

I did a 30 second long shot without the lens and checked the sensor and saw some dust on my sensor (even though camera has sensor cleaning). I didn't see any defects on photos yet, but is it something ...
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2answers
237 views

Can an Optical Low Pass Filter be applied via a lens filter?

I constantly see references to video being the application where an Optical Low Pass Filter is most useful, but it seems that still images do best without one. Would it be possible to then have a ...