28 votes
Accepted

How can a camera be both 12MP and 1080p, when 1920x1080 is just 2,073,600?

The 12MP designation is usually used to refer to still photography while the 1080p designation refers to video. The sensor has 12 megapixels - sometimes a little more which gets masked out. This ...
Itai's user avatar
  • 103k
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
19 votes

How can a camera be both 12MP and 1080p, when 1920x1080 is just 2,073,600?

1080p refers to video: 1920×1080 progressive scan. The phone is capable of 12 Mpixel still images but only 1080p video. (This is fairly typical; it takes a lot more processing power to take video at a ...
j_foster's user avatar
  • 490
15 votes

Do more megapixels mean sharper images?

Higher megapixels do not add to lens sharpness. This has been found by many Canon EOS 90D owners. It has 32.5 megapixel APS-C sensor. Its pixel density is the same as 83.2 megapixel full frame camera....
juhist's user avatar
  • 6,760
13 votes

Do more megapixels mean sharper images?

Not necessarily. Each lens can only produce a certain amount of detail, which means at some point it doesn't make sense anymore to increase pixel count because the given lens is not good enough for it....
jng224's user avatar
  • 1,608
11 votes

Do more megapixels mean sharper images?

It depends on the lens and the aperture at which it is used. Even a theoretically perfect (diffraction limited) lens can only generate an average of ~16MP at f/11 on a full frame sensor, and it goes ...
Steven Kersting's user avatar
8 votes
Accepted

What does "12MP + 12MP Camera" mean in the specs of a mobile phone?

A quick search indicates that that "12MP + 12MP" means exactly that: two 12MP cameras. One is a "standard" camera, for the other several possibilities exist (depending on maker): monochrome, wide ...
remco's user avatar
  • 3,161
7 votes
Accepted

Megapixel number - how many sub pixels?

A megapixel is literally 1 million pixels. There's no concept of sub-pixels (more on that in a moment). E.g. suppose a camera has a sensor resolution of 6000 x 4000 (to make the math easy) ... that ...
Tim Campbell's user avatar
  • 3,937
6 votes

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

Ken is right in the claim you quote — sort of. It is correct that digital cameras today (with the exception of those with Sigma's Foveon sensors) work by using a Bayer matrix, and sensor resolution is ...
mattdm's user avatar
  • 143k
6 votes
Accepted

Why does an X megapixel sensor produce X MB of data (in image files)?

To start with, the sensor doesn't output any color. Each pixel only records a single value: how much light struck the sensor. The number of bits determines how fine the steps between each brightness ...
Michael C's user avatar
  • 175k
6 votes
Accepted

How many megapixels is a 1000 pixel image?

Technically, 1000 pixels would be 0,001 megapixels. But that's probably not what was intended. 1000 pixels probably refers to the image width and height, whereas megapixels usually refer to area, ...
Yogu's user avatar
  • 196
6 votes
Accepted

Can the differences of a 18MP and 24MP camera be spotted?

Given a large enough print size, the difference in image quality will make itself apparent. The question then becomes, what is that print size? The graphic in this answer leads us to believe that ...
OnBreak.'s user avatar
  • 20.5k
5 votes

What does lens resolution expressed in megapixels mean?

In the video, Tony is probably referring to DxOMark's Perceptual Megapixel rating that they developed, because as they say, Most of our readers were not looking at MTF graphs While DxOMark hasn't ...
scottbb's user avatar
  • 32.7k
5 votes

Why does an X megapixel sensor produce X MB of data (in image files)?

Nearly all image file formats worth speaking of are compressed in some way. The mechanism for doing this varies depending on the file format you're using - but the files which you see will have been ...
Harry Harrison's user avatar
5 votes
Accepted

How high resolution can a picture be before the human eye stops caring?

I love this question. There are several concepts of resolution and several aspects that affect each one. I will be playing with different names, sorry for that, ppi, lpi, pixel density, etc, but you ...
Rafael's user avatar
  • 24.8k
5 votes

Is there a program that could analyze the "real" resolution of an image?

Theoretically, one should be able gradually to reduce image B's dimensions until reasonable sharpness is detected (bringing it as close to image A as possible, although without actually comparing them ...
StephenG - Help Ukraine's user avatar
5 votes
Accepted

Does the bigger pixel area of the Fujifilm XT-10 make it a better choice than the XT-100?

First important lesson: these automated comparison sites are terrible. They emphasize things which just aren't important and make them sound like a big deal. You say: XT 10 has a bigger pixel area ...
mattdm's user avatar
  • 143k
5 votes

Megapixel number - how many sub pixels?

There is a 1:1 correspondence between photosites and pixels in the resulting image. (Or close to that, give or take some things like distortion correction.) With most cameras, these photosites are ...
mattdm's user avatar
  • 143k
5 votes
Accepted

Canon EOS R or R5 with EF-S lens

When using an EF-S lens on any of the current EOS R series of cameras, only the center 22.5 x 15 millimeters or so will be used to contribute to the image. This is because EF-S lenses only project an ...
Michael C's user avatar
  • 175k
4 votes

How can I automatically downsize images which have more pixels than needed for the actual resolution?

I have a lot of pictures from my smartphone or my sports camera that may just have too many pixels. Is there a software way to detect this overweigth and reduce it? Preferably command line on linux. ...
Caleb's user avatar
  • 31.7k
4 votes

Megapixels: Do they matter that much?

I wouldn't think too much about the pixel difference, you will probably not really notice it (if your not truly into testing of course). Here is a link that compare the two camera bodies: http://...
Tindra's user avatar
  • 812
4 votes

More pixels or larger pixels? (the case of A7S II and A7R II)

Here's a somewhat lengthy article devoted to the differences between the cameras: Sony a7S II vs A7R II Test — Which One is Right for You?. What I got from the article, with respect to sensors, is ...
Caleb's user avatar
  • 31.7k
4 votes
Accepted

Is there a program that could analyze the "real" resolution of an image?

One approach might be to compute the two-dimensional Fourier transform of the image and try to decide the spatial frequency above which the transform (or, say, it's power) becomes noise, that is, ...
martin l smith's user avatar
4 votes
Accepted

Why does a more expensive camera have fewer pixels?

Apart from everything in Why does the Canon 1D X MK 2 only have 20.2MP For your two examples specifically: The EOS 5DS shoots 7 frames/sec, the EOS-1D X MARK II 14. That alone could be a good ...
ths's user avatar
  • 7,171
4 votes

Size of printed photo

Billboards are often printed with an apparently ridiculously low resolution if you only consider their absolute size. If you however also think about the typical viewing distance and how small they ...
jarnbjo's user avatar
  • 3,282
4 votes

Why 1 megapixel is always 1024×1024?

A megapixel is one million pixels. Mega is the SI-prefix for 106. If you arrange 1 million pixels in a square, it will be 1000x1000. But really it is just a count of the pixels, there's no connection ...
ths's user avatar
  • 7,171
4 votes

Does higher MP magnify the subject?

No, more megapixels does not magnify the image (meaning the subject image). Focal length (zoom) magnifies the subject size in the image. Magnify is a word referencing the subject size within the ...
WayneF's user avatar
  • 12.9k
4 votes

Does higher MP magnify the subject?

The standard meaning of optical magnification/magnification ratio has to do with the physical size of the object and the physical area of the image plane (film/sensor) that it occupies when recorded. ...
Steven Kersting's user avatar
4 votes

Canon EOS R or R5 with EF-S lens

Not sure if you upgraded your kit or not, but I've have several Canon bodies and depending on your need, it's always best to pick IQ over tech specs. For starters since you're a concert photographer, ...
ultradave's user avatar
4 votes

Sensor pixel size "pixel area" any important?

That's just the nature of fractions. 5/4 (1.25) is the reciprocal of 4/5 (0.80). 1.25 - 1 = 0.25 = 25% 1 - 0.80 = 0.20 = 20% 5.95µ is 25% greater than 4.76µ 4.76µ is 20% smaller than 5.95µ So whether ...
Michael C's user avatar
  • 175k

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