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by Rodrigo

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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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11
votes
3answers
921 views

What are differences between Bayer mosaic and Foveon 3 layer sensor?

To filling my appetite on camera things hunger I've came across to Sigma website and found this 3 layer sensor stuff. Can anyone really explain this based on their experience or research about this? ...
5
votes
2answers
1k views

Is it sensor damage? Or dust?

I have been trying to shoot partial solar eclipse today with my Nikon D3100, and later noticed this spot on images: http://pix.academ.org/img/2011/01/04/70baea815d1557594f096a82ab05704f.png I do not ...
7
votes
1answer
5k views

What effect does UV filter provide?

I know that I should always use a filter on my lens to protect the camera lens, however, exactly what impact to the picture does using a UV filter have since that is the one most often used? Do I ...
18
votes
3answers
2k views

How can dynamic-range be larger than sensor bit-depth?

Found something that confused me and so I thought the crowd here can probably answer this one since its camera-related and technical at the same time. How can dynamic-range be larger than sensor ...
10
votes
2answers
10k views

What is the Chief Ray Angle (CRA)?

I want to select image sensors for a particular application. One term that I have come across regularly in their datasheets is the CRA. I was comparing 2 image sensors and although they were of ...
43
votes
8answers
21k views

What does “expanded ISO” mean?

The ISO specification for the Canon EOS 7D reads as follows: High ISO For handheld shooting in low light, the EOS 7D offers ISO speeds of up to 6400. Expandable to ISO 12800, for low light ...
55
votes
7answers
39k views

Can the sun damage the camera sensor? Under what conditions?

I want to experiment taking photos where the sun appears. I'm afraid of what might happen if I take one with a narrower angle (where sun would be bigger). Can the lens act as a magnifying glass and ...
81
votes
7answers
37k views

When do the differences between APS-C and full frame sensors matter, and why?

I'm trying to decide on a higher-end digital SLR, and I'm down to choosing between an APS-C model and a full-frame model. I understand that the sensors are of different sizes, and as such have an ...
6
votes
1answer
270 views

Why does my sensor flip up slow on live view?

I have noticed some strange behavior on my 450D tonight. I was shooting some macro on Live-view(couldn't get low enough using the viewfinder) and I noticed that after my shots(approx. 2-second shutter ...
14
votes
5answers
720 views

Does it matter which way the camera is orientated for the sensor cleaning to work?

With the advent of sensor cleaning in newer bodies - does it matter which way up you hold the camera whilst it is cleaning? I understand that the sensor cleaning works by vibrating the sensor to knock ...
15
votes
4answers
5k views

When shooting in mRAW or sRAW, how does the camera generate smaller files?

Most mid- and high-end DLSRs offer two or three sizes for RAW capture. When the camera is generating the medium or small sized RAW files, how does it make them smaller? Does it capture less ...
19
votes
3answers
5k views

What is meant by the “native ISO” when talking about DSLRs?

The new Nikon D7000 is out, and a lot of previews has touted the "native iso" of D7000 to be 100. What does this actually mean? I'm assuming it means it performs at its best at iso 100, which means ...
17
votes
3answers
9k views

Are digital sensors sensitive to UV?

Is there any way, shape, or form that ultraviolet light is recorded by a digital sensor? Ideally, this question is related strictly to the sensor, without even a glass lens in between which could cut ...
8
votes
1answer
5k views

How to fix an image sensor damaged by long sun exposures?

I took a number of shots of the sun during mid-afternoon and now all my images have pink spot where the sun was. Is there anyway to fix this, or is it permanently damaged? The camera was pointed at ...
17
votes
5answers
8k views

Can a laser pointer damage the sensor in a digital camera?

I once experimented with standing in a dark room and directing a laser pointer towards my digital camera with a long shutter speed while moving the two about. I made a few images that way; one was ...
20
votes
6answers
4k views

How many stops can a digital camera capture?

How many stops can a digital camera capture? Additionally, does anybody know what the dynamic range is for negative and positive film, the human eye, computer monitor, the television, etc...
26
votes
11answers
3k views

What is the best way to clean the sensor on a digital SLR?

I've got a couple of spots of dust on the sensor of my Canon 20D - a rocket blower isn't shifting them, and I'm ridiculously scared of some of the more direct methods for cleaning sensors -- what ...