Open

by damned truths

submit your photo


Hall of Fame
View past winners from this year

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

2
votes
2answers
272 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 ...
2
votes
1answer
340 views

Why might my camera show spots in video mode?

I own a Canon Rebel T1i, and when I try to record video, there are two dark spots on the screen. These do not appear when I take photos. Video (spots in center and right center): Photo: Does ...
2
votes
1answer
54 views

Contradiction in information resources on capturing UV light with a digital sensor [duplicate]

I encounter a contradiction. Many resources state that a digital sensor are unsensitive to UV light. Even wikipedia, "However, newer photographic film and digital cameras are highly insensitive to ...
2
votes
1answer
292 views

How do digital sensors that capture one color at each photosite compare to sensors that capture many colors?

There are different type of digital camera sensors, those sensors that can capture only one color at each photosite and those who can capture more than one color at each photosite. Which one is ...
2
votes
3answers
3k views

How can I easily tell if a sensor or lens is damaged?

I am pretty interested in recognizing any damage to digital camera in very low level (without any advanced tests). For example, how can I identify the damage of a sensor or lens? If there are any ...
2
votes
1answer
645 views

Why does my Nikon D90 make a strange sound during built-in sensor cleaning, when my friend's D90 doesn't?

I noticed a quiet sound (like squeaking) when using the built-in sensor cleaning of my Nikon D90. In some forums I read about many people having this behavior with the Nikon D700 and some Canon ...
2
votes
2answers
148 views

How to estimate camera sensor size?

I am using a smartphone for capturing photos and I need to estimate the camera sensor size (mm*mm). I have the resolution (in pixels) and the focal length (in pixels). I can also measure the size of ...
2
votes
1answer
113 views

Signal:noise ratio not really decreasing with ISO for Pentax

In SNR graphs for Pentax K-30 and Pentax K5 there is something I do not get. For ISO after 1600 the SNR doesn't really decrease. Moreover comparing with Nikon D3200, we can clearly see that until ISO ...
2
votes
2answers
1k views

Nikon D600: how to fix hundreds of photos with dust on them?

Like many D600 owners, I'm hoping that the dust on sensor issue that comes with this otherwise nice camera will somehow solve itself. In the meantime, I have hundreds of shots that I took with an ...
2
votes
1answer
390 views

What is causing this one line on all my photos from Nikon D3100?

Whenever I take a picture with my dslr, there is a strange line that shows up on the left of the picture all the time. Can this be fixed my myself, or do I have to send this one in?
2
votes
1answer
240 views

Does the Canon EOS Rebel T5/1200D has any dust related problems?

I’m planning on purchasing the Canon EOS Rebel T5/1200D very soon, it’s the only DSLR that fits my budget (other one is the Nikon D3100 which I don’t plan to get). I like everything about the camera ...
2
votes
1answer
119 views

Does a deeper photosite increase the dynamic range?

As I understand, a bigger photosite (on the sensor) enables a bigger dynamic range and also better high ISO performance. Is there a reason not to make the photosite deeper?
2
votes
1answer
331 views

What is the precise definition of SNR, as used by DxOmark?

What is the precise definition of signal to noise ratio, as used by DxOmark? Please see here, after clicking Measurements, SNR 18% (it's not directly linkable). I am looking for an explanation (in ...
2
votes
2answers
181 views

Why can I recover more highlights RAW files from some cameras than from others?

I have two cameras that both shoot raw: Nikon D800 and Fujifilm X20. When editing I have discovered that I can recover a lot more information from a D800 raw image than a X20 raw image. Is it because ...
2
votes
1answer
126 views

Does security scanning a camera with battery inside cause damage to the sensor?

I was at 911 memorial last week. My Fuji S-1 Pro camera was scanned with the battery installed. Security personnel would not let me remove battery. Since then, a dark spot shows up on photos. This has ...
2
votes
0answers
83 views

How Focal Lengths is related to Sensor Size? [duplicate]

Possible Duplicate: What is the difference between focal length and crop factor? I was watching a video review of Tamron 70-300 lens where he mentioned that effective Focal length for a ...
1
vote
4answers
279 views

Have DSLR sensors made improvements since the transition to CMOS?

I know that CMOS sensors appeared in the beginning of 90s, and evolved up to 2000s. I'm mainly talking about high ISO photos quality. For example, Canon 5D mark 3 has better results in high ISO tests ...
1
vote
1answer
114 views

What are the main limiting factors for dynamic range in modern cameras?

Another question got me thinking about what is limiting dynamic range in digital cameras. From my understanding the precision of the analogue-to-digital converter, i.e. how many discrete levels it can ...
1
vote
1answer
191 views

Do video cameras use the same image sensors as still cameras?

Do video cameras have the image sensors cameras have? I really don't know what I'm talking about, so if the answer was explained, I would really appreciate it.
1
vote
4answers
108 views

Can exposure parameters be kept high even at high ISO sensitivity, to keep image quality up?

Following is from Film speed Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ...
1
vote
1answer
68 views

Why is a camera's dynamic range expressed as its photosite capacity divided by the read noise level?

For example, if a camera has a dynamic range of 44900/10, why would the range of greyscale levels available is equal to 4490? I know that 44900/10=4490 but this kind of reply didn't satisfy me. Let's ...
1
vote
1answer
63 views

Same mfg process = same performance in FF vs. cropped sensor?

I've seen generalizations that full-frame sensors tend to exhibit better low-light performance and dynamic range than a cropped-sensor specifically because they tend to use larger photosites that ...
1
vote
2answers
386 views

Sony A7R Noise compared to Nikon D800/E Sample Explanation

I am looking for a high resolution camera for fine art prints and the Sony A7R seems great since it has the same Sensor res as the D800 in a smaller enclosure. For some reason when I look at sample ...
1
vote
3answers
276 views

How much does the sensor affect image quality if shooting in RAW?

Knowing there are different sized sensors and a nearly unlimited combination of lenses with the various cameras, since RAW captures RAW light data, how much does the sensor itself play a role in ...
1
vote
2answers
78 views

Point and Shoot sensor

In a point and shoot camera, is the sensor exposed even when the camera is off? ie. If the camera is off, can the sun still damage the sensor? Thanks very much.
1
vote
4answers
564 views

Question About the D600 Dirty Sensor Test - Why Use a High f-Stop? [duplicate]

There is a lot of buzz about the dirty sensor problem on the D600, which is apparently caused by some lubricant splattering onto the sensor and accumulating over time. My question is about the test ...
1
vote
1answer
833 views

how does full frame cameras give better bokeh than crop sensor? [duplicate]

Possible Duplicate: When do the differences between APS-C and full frame sensors matter, and why? Why does a bigger sensor lead to a shallower depth of field? When I compare my camera ...
1
vote
2answers
1k views

How can I clean the sensor on a Panasonic LX5 compact camera?

I've noticed there appear to be some specs of dirt on the sensor of my panasonic LX5 and was wondering if anyone had any tips on how to clean the sensor on this camera? I found this link which has ...
1
vote
3answers
322 views

How does the spectral sensitivity of different sensors affect the resulting photo?

I am learning about light and color formation but I don't understand how does the sensitivity affects an image. Take for instance the different sensitivities for two "cameras" for each RGB channel ...
1
vote
2answers
172 views

Big sensor and landscape photography, DoF

I've been an owner of point & shot cameras for some years. Now, I'm considering to move to bigger sensor cameras (4/3, asp-c) because I really hate the noise that small sensors produce on low ...
1
vote
1answer
1k views

What is causing this white spot in every photo with my D90?

Recently I noticed that the photographs from my D90 has an odd white dot in it. The dot is present in every image. The dot becomes clearly visible as I zoom into the image. I have attached a photo ...
1
vote
1answer
49 views

General guidelines on choosing a lens for an image sensor [closed]

Not sure if this is the right place to ask this question, but here it is: I am trying to get up and running a VGA image sensor: 2755um x 2050um image area with 4.2um x 4.2um pixels and 640x480 ...
1
vote
2answers
218 views

is a camera sensor size cropped according to the change in pixel aspect ratio of a resolution?

As an example, canon 6d full frame has the highest resolution of 5472 x 3648 with a pixel aspect ratio of 3:2 . As this is the highest I assume this is utilising the full size of the sensor. If the ...
1
vote
3answers
500 views

Do these colored streaks mean that my CF card is bad?

I have been shooting with the same Nikon d700 for about three years (about 200k clicks). I started seeing a streak run across one out of every 250 images (example here: http://wp.me/aRb6L-1lT). So, I ...
1
vote
0answers
164 views

Canon 6d color noise (and compared to 50d)

my first day with 6D, upgraded form 50D. Wouldn't be pixel peeping but something unusual caught my eye when I opened photos in Lightroom this morning. The color noise pattern is completely different ...
1
vote
0answers
68 views

Bright dots on all images [duplicate]

Possible Duplicate: Why is my camera showing a lot of stuck red and white pixels? Recently I noticed that on every picture I take, there are some tiny (close to pixel size) bright dots ...
0
votes
4answers
115 views

Dark spots - sensor toast?

I can't seem to get rid of some very annoying dark spots that are very noticeable under certain lighting conditions. I've taken a test shot of my monitor showing a white background and amped up the ...
0
votes
4answers
714 views

Shooting 50mm EF vs EF-S

I have a Canon EOS 550D with a APS-C sensor. I have two lenses, (1) Canon EF-S 18-135mm f/3.5-5.6 IS and the (2) Canon EF 50mm f/1.8 Mk II. If I use the 50mm focal length in the first EF-S lens... I ...
0
votes
2answers
110 views

why is a compact sensor brighter than a APS-C size sensor

So I may be missing something but I cannot think what it can be. I have a Sony compact hx9v and an NEX-6. the 16mm on the NEX is very similar to the compact at its widest, so I thought I would ...
0
votes
3answers
83 views

A/D conversion, processors marketed less actively than sensor characteristics?

Two questions: In most literature about digital photography, there is some info-graphics about the path of the light signal from sensor to the storage. It starts with sensor, then there is the ...
0
votes
2answers
4k views

What is the difference between APS-C and Full Frame sensor? [duplicate]

Possible Duplicate: When do the differences between APS-C and full frame sensors matter, and why? I was doing research in buying the Sony NEX-7 camera, but today the news was all about the ...
0
votes
1answer
106 views

How does long exposure photography work on digital cameras?

For analog photography it's pretty easy, the film is exposed to light during the exposure time, but what about digital sensors ? As far as I know a sensor can't "be exposed" for a long period of ...
0
votes
1answer
70 views

Why is my Canon Digital IXUS/ELPH making distorted photos with purple cast

My ~10 year old Canon PowerShot Digital ELPH S410 (IXUS 430) has been left in a drawer for the past 6 years. I took it out recently to give to my young son as his first camera, but the pictures have ...
0
votes
1answer
68 views

What is the MECHA DEVICE SERVICE in the Sony Alpha 7

It just came back from the repair with a listing that this part was changed out A1976128A. Any idea what it is? I'm guessing it's the sensor, but it's weirdly named.. nothing else comes up on google.
0
votes
1answer
4k views

DSLR Sensors vs Exmor APS HD CMOS Sensors, Product Recommendation [duplicate]

Possible Duplicate: What should I look for when shopping for my first DSLR? I'm a tad new towards DSLRs and Compact DSLRs (am I calling them right?), but here goes - What are the ...
0
votes
1answer
191 views

Has Canon released any point and shoot cameras without optical low-pass filters?

Do either the Canon PowerShot SD880 IS or the S100 have anti-aliasing filters? If so, has Canon announced any P&S model(s) without OLPFs?
0
votes
0answers
24 views

Auto Capture with Camera - Sensor Activated

I have a camera challenge that I'm trying to solve. Are there ways to configure a camera to take images automatically, upon the the target being in a specified location? For example see, the video ...
0
votes
0answers
17 views

Is it possible to calculate f-stop gain/loss for different sensor size? [duplicate]

I would like to know if it is possible to calculate f-stop gain/loss for different sensor size. For example, how much light can capture an aps-c vs a 1/2.3 sensor ? Thank you
0
votes
0answers
37 views

Does a smaller sensor give shallow depth of field? [duplicate]

I have read that a full frame sensor gives a more shallow depth of field if using the same lens as on a crop frame sensor. Is this true? What I actually want to know is how does this relate to a point ...
0
votes
0answers
92 views

Good examples of full frame's advantages over the cropped sensor? [duplicate]

There is a good topic on the site called "Good examples of RAW's advantages over JPEG?" There are many theoretical discussions over the internet including on this site about the full frame and ...