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A megapixel (MP or Mpx) is one million pixels, and is a term used not only for the number of pixels in an image, but to express the number of image sensor elements of digital cameras or the number of display elements of digital displays.

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5answers
2k views

Is it true that '80s 35mm photofilm had quality corresponding to 24 megapixels?

Is it true that '80s 35mm photofilm had quality corresponding to 24 megapixels? Somebody told me so today, and I find it surprising.
0
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0answers
35 views

How big can I print my 24mp image? [duplicate]

So I have a 24mp photo that I want to print as large as I can, at 300dpi; how large is that? And more generally, how is the print size calculated as a function of the capture and print resolution?
9
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4answers
20k views

Are 2 megapixels enough for HD resolution pictures?

HD pictures has 1920x1080 = 2073600 pixels = 2025 kilopixel = 1.98 megapixel. Does this mean that we can take HD pictures with a 2 MP camera? If not, why not?
0
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0answers
54 views

Is there a meaningful image quality difference between the Canon Powershot SX410 vs SX510?

Can you show me a picture difference between the Canon Powershot SX410 and the Powershot SX510? Is there a noticeable difference between 12 megapixel and 20 megapixel here? I want to buy one of these ...
0
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2answers
97 views

What is it called when a camera generates files with more megapixels than the actual sensor provides?

I found in many Android devices that the "real array size", which is the actual pixel count of the camera sensor, is lower than the 4:3 Max picture the user can take. For example: Sensor Array = 1616 ...
4
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2answers
455 views

Ming Thein's Ultraprint: the megapixel race reloaded?

I read with quite a bit of interest the new idea from Ming Thein: the Ultraprint(1). The idea (if I understand well) is to make a print that, independently from the viewing distance, is so dense ...
-7
votes
2answers
261 views

What is Nineteen Megapixels minus Sixteen Megapixels?

Recently I opted to buy a camera. I asked my brother a suggestion regarding my purchase, and suddenly he started to ask me number of questions. I was able to answer all the questions, except this one: ...
0
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0answers
25 views

What my PPI should be set at for others to download my photos? [duplicate]

I sell my photos on Etsy for others to buy and download and I'm trying to figure out what I should set my PPI at and if I should resample when I do it...it is all very confusing. I'm reading all ...
7
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5answers
2k views

Does noise in images depend upon “Megapixels” or “ISO”?

I have a question about image quality. Does noise in an image is depends upon "Megapixels" or on "ISO"?
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2answers
82 views

Is resolution the same thing as active pixel count?

If you have a camera with resolution Y x X, then is active pixel count always the product of the resolution? Are they saying essentially the same thing?
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4answers
1k views

Is the camera sensor or the lens the limit to resolution?

I have a pretty high res sensor on my camera, but sometimes I have the feeling my lens doesn't even get to this resolution. How can I tell if my camera sensor has not enough resolution or if the lens ...
7
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8answers
4k views

How many pixels in a megapixel?

I am trying to find out the definition of a megapixel? Some references on the web place it at 1 million pixels, and other places say it is equal to 2^20 = 1,048,576 pixels.
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10answers
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How many “MegaPixels” can the human eye see?

There is obviously a limit to what the human body can process, such as frames per second. My question is how many MegaPixels would it take before the human eye can no longer differentiate it from ...
4
votes
8answers
1k 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 ...
-2
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1answer
231 views

Which of these two metrics is a good measurement of sharpness?

I have seen two metrics used to measure the sharpness of a camera: Perceptual megapixels, used on Dxomark. Number of lines the camera can resolve in a resolution chart. However, these two ...
35
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8answers
5k views

Do megapixels matter with modern sensor technology?

Are more megapixels good? Are more megapixels bad? Do more megapixels increase detail? Do they make my images sharper? On the other side, is there a point that is too much? Do megapixels cause ...
12
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5answers
9k views

Camera lens or megapixel value: which defines the quality and clarity of the picture?

I have a 5MP camera in my phone. The pictures shows good clarity both in the phone screen and my computer screen. But one of my friends has a different camera with the same 5MP in his phone (brand is ...
15
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6answers
4k views

What megapixel value is equivalent to which ISO film?

Is there some kind of equivalency table or formula that expresses what kind of pixels you need in a digital camera to have roughly the same quality as a particular ISO graded film? What other ...
4
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3answers
619 views

Is the megapixel count setting on a P&S digital camera real or a gimmick? [duplicate]

Does downsizing the effective recording megapixel count setting on my P&S digital camera actually decrease the sensor-megapixel density, thereby increasing pixel size and culminating in better ...
8
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2answers
2k views

Are superzoom lenses really so bad?

I have read comments in multiple places, both on photo.SE and elsewhere, that superzoom lenses are not good and that most people will be better served by buying two zoom lenses, each spanning a ...
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3answers
169 views

What were important things you took into account when purchasing your first camera and lens? [closed]

Ok I am ready to purchase my first serious camera. I owned a FujiFix s1800 but didn't like the quality of the headshots I took. Headshots would be the main reason for purchase but I'd also like to ...
1
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1answer
320 views

Am I correct that photos from the 16-50 lens won't be much better than cropping photos from the 35mm prime?

I own a Sony NEX-5R, with the Sony 35mm F1.8 prime and the Sigma 19mm F2.8 prime. I'm deciding whether to buy the Sony 16-50 power zoom. To make that decision, I need to decide whether cropping the ...
0
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2answers
265 views

D3100 vs D3200 Image Quality both set to 12MP [duplicate]

Both D3100 AND D3200 have similar, almost identical, sensors. Which is going to give the best image quality if I set them both to, for example, 12MP? I also also placed the pixel sizes below. D3100 - ...
0
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1answer
577 views

Does pixel size make a difference in image quality? [duplicate]

I am thinking of purchasing the Nikon D3200 its a 24.2MP camera but the pixel size is 14.8 µm² compared to the D3100 which is 14MP and a pixel size of 25.1 µm². Is this something that i should worry ...
3
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2answers
130 views

5d mark 1 vs 5d mark 2

I never shoot video with my mk2. I only take portraits, no issue with slower shutter speeds etc. Pragmatically, what would be the main disadvantages of downgrading, in terms of output and image ...
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4answers
2k views

Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later?

Suppose you want to store your photos at some lower resolution, let's say about ~1 MB large. You own a camera able to make photos at 5 MPix and more. And, you want to have the maximum quality at the ...
4
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1answer
220 views

For digital sensors and in terms of imaging medium, is the minimum CoC equal to the size of 1 sensor pixel or 2? And why?

For digital sensors and in terms of imaging medium, is the minimum CoC equal to the size of 1 sensor pixel or 2? And why? For example purposes using a 35mm Full Frame digital sensor where the pixel ...
4
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2answers
424 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 ...
12
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8answers
3k views

Megapixel race unnecessary?

Have we reached the point where where the megapixel race is more about the race, of having more then the other guy, than about image quality? Only a few years ago 6MP was touted as the optimum number ...
5
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2answers
641 views

Do compact and DSLR cameras have the same sensor size if they have the same number of megapixels?

In the analog camera, I understood the impact of using a 35mm film vs using a 70 mm film. However in digital world, I dont know if the sensor size is the same for compact and DSLRs. In other words, ...
0
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1answer
975 views

What does pixel count suggest? [duplicate]

Possible Duplicate: Do megapixels matter with modern sensor technology? Mobile phone manufactures now advertise their phones having camera with bigger megapixel count. Does it mean the ...
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2answers
8k views

At how many megapixels should I render my image for a quality A1 print?

I'm rendering an image for an exhibition (the image is composed of multiple digital images, so I have control over the detail of the final render), but I'm getting conflicting opinions on how many ...
0
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1answer
303 views

Image Quality of Shooting at 3MP then resizing to 1MP vs Shooting at 1MP [duplicate]

Possible Duplicate: Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later? I want my final image to be stored at 1MP and I want it to be in ...
11
votes
8answers
77k views

How does 18 megapixels compare to 12 megapixels? [duplicate]

I'm purchasing a digital camera & it says, "Effective pixels: Approx. 18.00 Megapixels". What is this compared to 12.00 megapixels?
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2answers
389 views
9
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3answers
4k views

Does change of lens affect a camera's megapixels?

I have a Nikon D40. It has only 6.1 MP. I am planning to buy additional lens for it. Can changing the lens of the camera increase or decrease the megapixels of the camera?
0
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1answer
563 views

How does the megapixel-count and the aperture size affect the quality of the image from a given lens?

I have read that some lenses don't "support" high resolutions, so, for example, for some lenses (e.g. Nikkor 16-85 VR ), it's better to shoot at 9MP, instead of shooting at 16MP. Is this the case ...
13
votes
5answers
3k views

How does taking lower-resolution pictures with a higher-resolution sensor affect image quality?

Does taking a picture with 8 megapixel resolution with my Canon IXUS with a 1/2.3" sensor and 12M max resolution provides the same or worse image quality (particular, noise) as if the picture was ...
4
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2answers
2k views

What features really matter in a point and shoot camera?

I am planning to buy my first new digital camera. Now I am too confused for more than 20 days about how I can choose a camera. I want to use the camera for domestic purpose. The Canon IXUS 220 HS ...
2
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2answers
1k views

Is there any difference between the Sony A65 and A55 other than megapixels?

When I look at dpreview's side-by-side camera comparison page, there is no difference between two cameras except pixel count (24MP vs. 16MP). If that's the only difference then $200 isn't worth it ...
12
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4answers
2k views

Why do some DSLRs have fewer megapixels than some pocket cameras?

Some point and shoot cameras like the Olympus mju range have more megapixel capabilities than many DSLRs. Why is this? Is this because they have larger sensors or more dense ones? What are the ...
9
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3answers
1k views

Is more megapixels better in macro photography?

I know there are a lot of common misconceptions about megapixels and their actual utility, but does more megapixels mean I can zoom into a macro shot of say an insect and see more details compared to ...