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52 votes
Accepted

Canon geometric overexposed quadrilateral shapes in all of my images

It looks like you've got a problem with the shutter. Possibly one of the "blades" in the second curtain is missing and allowing light to strike the sensor between the time after the second curtain has ...
Michael C's user avatar
  • 175k
50 votes

What would be causing a thick black diagonal line in front of my camera's sensor?

From what I see this is element from the shutter. And my humble advise is to send your camera to repair shop, give it in to the hands of professional, do not try to repair it.
Romeo Ninov's user avatar
  • 12.1k
47 votes
Accepted

What's the point in covering the viewfinder?

On SLR cameras, the optical path is connected to the viewfinder. Even while a picture is being taken and the mirror is up, blocking the viewfinder path, it's possible the seal/gasket between the ...
scottbb's user avatar
  • 32.8k
42 votes

Is it true that the best images from all digital cameras can be obtained at ISO 200?

There is an ISO which is not necessarily 200 that is the native sensitivity of the silicon from which the sensor is made. That sensitivity depends on the sensor itself, so will vary between cameras, ...
Itai's user avatar
  • 103k
40 votes
Accepted

Why don't cameras offer more than 3 colour channels? (Or do they?)

Why don't cameras offer more than 3 colour channels? It costs more to produce (producing more than one kind of anything costs more) and gives next to no (marketable) advantages over Bayer CFA. (Or ...
Euri Pinhollow's user avatar
40 votes

Why do photos with different settings produce different spots?

Let me just complement Xenoid's answer. In this diagram, you can see how a bigger aperture produces a diffused shadow, that sometimes is hard to see. And when you use a smaller aperture, the shadow of ...
Rafael's user avatar
  • 24.9k
34 votes

How many pictures can you take with a Sony mirrorless camera before the sensor fails?

Unlike a mirrored camera, there is little likelihood of the sensing system in a mirrorless camera suffering a catastrophic failure so it is really up to your "taste" to determine when a sensor is too ...
PhotoScientist's user avatar
32 votes

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

At very wide angles the danger is much less and taking photos with the sun in the field of view doesn't normally harm the camera or lens. When the sun is very low on the horizon the energy is also ...
Michael C's user avatar
  • 175k
28 votes
Accepted

Signal to Noise Ratio over the years

This data was iffy then — not really enough data points, and the trendline is dubious: Source: a very timely xkcd That said, the company DxOMark does measurements of camera sensors all the time, ...
mattdm's user avatar
  • 143k
28 votes

What causes these squiggly lines in my photos and on my sensor?

Looks like fungus on the sensor (possibly under the low-pas filter). Some examples: https://www.flickr.com/groups/canondslr/discuss/72157604712577076/ https://www.dpreview.com/forums/thread/3556906
xenoid's user avatar
  • 21.4k
24 votes
Accepted

RAW files store 3 colors per pixel, or only one?

Raw files don't really store any colors per pixel. They only store a single brightness value per pixel. It is true that with a Bayer mask over each pixel the light is filtered with either a Red, Green,...
Michael C's user avatar
  • 175k
24 votes
Accepted

Is it true that the best images from all digital cameras can be obtained at ISO 200?

The information your friend gave you was essentially correct for most digital cameras, particularly compact digital cameras with very small sensors, made about 15-20 years ago. Digital imaging sensors ...
Michael C's user avatar
  • 175k
23 votes

Why do photos with different settings produce different spots?

This is typical of sensor dust, the spots are more visible at small apertures. In fact taking a picture of the sky with a small aperture (large f-number) is the usual way to check for dust spots... So ...
xenoid's user avatar
  • 21.4k
21 votes

What would be causing a thick black diagonal line in front of my camera's sensor?

The item obstructing the sensor is a shutter blade. Your shutter has failed and needs to be replaced. There's no hack or DYI solution for this problem. This is a hardware problem and not something ...
Frank's user avatar
  • 674
21 votes
Accepted

How is picture format related to sensor format resolution?

1/1.57″ is not a height/width ratio, but the diagonal of the sensor measured in inch. For some reason, camera manufacturers tend to define the sensor size as a fraction instead of simply writing 0.64″....
jarnbjo's user avatar
  • 3,280
20 votes
Accepted

What are physical causes of clipping?

What exactly limits modern digital camera sensors in capturing light intensity beyond certain point? In terms of the physical properties of the sensor itself: The number of photon strikes and the ...
Michael C's user avatar
  • 175k
20 votes

Why should we be interested at incident metering?

You said: What is important is the subject being well-exposed to the sensor. Exactly – you've hit the nail on the head. Imagine photographing a bride and groom. The groom has worn a black suit and ...
osullic's user avatar
  • 12.4k
19 votes

Why don't cameras offer more than 3 colour channels? (Or do they?)

A few notes from this long-time optical systems engineer. First, there are things called "hyperspectral" cameras which use gratings or equivalent to break the incoming light into dozens or ...
Carl Witthoft's user avatar
19 votes

Why doesn't digital Large-Format exist?

It depends on how you define camera. In a sense, digital large format does exist, just not exactly in the way we might expect. There are commercial products called 'Digital Scanning Backs' that fit ...
Michael C's user avatar
  • 175k
18 votes

How to build an attachment to support lens?

I am using a D5200 and wish to find the height of the centre of the sensor from the base of the body. I don't know the number, but you should be able to measure the distance easily enough. It's a ...
Caleb's user avatar
  • 31.7k
16 votes
Accepted

Hot, stuck, or dead pixels. What's the difference?

Excitingly, these terms mean different things to different people. I think the most useful distinction is like this: Stuck pixels are always completely bright, as if they're fully overexposed Dead ...
mattdm's user avatar
  • 143k
14 votes
Accepted

Why is the IR filter present when there is already the Bayer filter on an image sensor?

The Bayer filter passbands are designed to be make the sensor have a reasonable match to the human eye, while not costing too much. They're fairly leaky even in the visible part of their stop band, ...
Chris H's user avatar
  • 3,812
14 votes

Why don't cameras offer more than 3 colour channels? (Or do they?)

RGB camera sensors are so popular because they reproduce human vision That's what most people need - making photos that look like what we see. Replacing RGB subpixels with more different kinds of ...
szulat's user avatar
  • 5,059
14 votes

Why are camera sensors green?

An unfiltered CCD or CMOS sensor looks very similar to any other silicon integrated circuit that has a very regular/repeating structure of similar structure size - semi-metallic gray (from silicon, ...
rackandboneman's user avatar
14 votes

What causes these squiggly lines in my photos and on my sensor?

This is too long to post as a comment: In a past life I've looked at many silicon wafers under a microscope with various stacks of deposited thin films and while I can't say so definitively, the ...
uhoh's user avatar
  • 1,817
13 votes

Can smartphones with the same camera sensor have different image quality?

Note: This is a simplified answer. It does not go into detail, and therefore, please do not take it as authoritative answer on specifics about the exact processes that take place inside a digital ...
flolilo's user avatar
  • 6,468
13 votes

Giant bright spot on right of image in all photos?

That's a lot of images... My best guess is that the leaf shutter is failing. I believe the G1X uses a 2 bladed leaf shutter that kind of scissors open, much like they used in their rangefinder film ...
Steven Kersting's user avatar
13 votes

Giant bright spot on right of image in all photos?

2 Years of 1 photo every 1.5 minutes is about 700,000 shutter activations. I couldn't find any lifetime calculations for the G1X, but going by stats for DSLRs (and yes I know the G1X is mirrorless - ...
Peter M's user avatar
  • 2,036
12 votes

Would APS-C be better for shooting wildlife?

Crop sensors are indeed used for wildlife to get more reach without sacrificing megapixels. And, you can get closer images without spending as much money. Sure, you could crop, but then your printing ...
Andrew Sharpe's user avatar
12 votes

What causes these squiggly lines in my photos and on my sensor?

It looks like the two main hypotheses are: Fungus (xenoid) Cracks (uhoh) Either seems possible, and with the given info (including the updated photos), neither can definitively be ruled out. It ...
xiota's user avatar
  • 27k

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