What is a good camera for photography over 16mp?
回答 (6)
2016-09-04 9:59 pm
Using 16MP as a guide isn't really a good idea because you're not taking into account the main features of the camera that will allow you to get the shot. Since there are so many different types of photography ranging from macro, to portraits, to sports to astrophotography, buying a camera solely on how many pixels it has is just a bad idea.
What's far more important than the number of pixels are the features of the camera that allow you to consistently get the shots that you need to capture, AND, allow you to get those shots they way you want to capture them. For example, if you have a 12MP camera like the Sony A7S II, you will have full control over all aspects of the image-making process. So when you want to intentionally produce motion blur such as when taking photos of a waterfall, you can do so. While a point-and-shoot camera with 20MP that only has full auto exposure and provides no way of changing things, will not allow you to get the same quality of image. It would be like buying a vehicle solely based on gas mileage and not taking into account what you want to do with it. Sure a Prius gets fantastic mileage, but if you need a vehicle to haul things around, you'd be far better off with a pickup truck. So buy the camera that best fits the purpose for which you intend to use it.
On a technical level, the number of pixels is not anywhere nearly as important as the size of the sensor and the size of the pixels. The larger the sensor, the larger the pixels can be. Having a large sensor not only allows for larger pixels, but for of them too. This has a huge impact on image quality because as the pixel size increases so does the dynamic range (DR). DR is the sensor's ability to render detail in highlights and shadows. Cameras with more DR can render those details in situations where the difference in brightness between the shadows and highlights is extreme such as on bright sunny days when there can by as much as 6-8 stops difference between the brightness of the shadows and highlights - or more.
Furthermore, as the pixel size increases, the pixel therefore can capture more light during any given exposure purely because it has a larger surface area. This larger surface area will allow the pixel to be struck by more photons which result in a stronger signal for which the camera then uses to interpret color and brightness. As the pixel size decreases, so does the signal, and therefore the camera will need to amplify the signal. Because you can't amplify the signal without also amplifying the noise, cameras with small pixels will have much more noise even at low ISOs such as 100-400. This can easily be seen in any photo taken with a smartphone. While the image may look fine in the 4" LCD of the phone, once viewed larger on a print or on a computer monitor, all of the noise and imperfections become painfully obvious.
All of this explains why a camera like the Sony A7S II with "only" 12MP will produce a far better looking image than a point and shoot with 20MP or a smartphone with 41MP.
What's far more important than the number of pixels are the features of the camera that allow you to consistently get the shots that you need to capture, AND, allow you to get those shots they way you want to capture them. For example, if you have a 12MP camera like the Sony A7S II, you will have full control over all aspects of the image-making process. So when you want to intentionally produce motion blur such as when taking photos of a waterfall, you can do so. While a point-and-shoot camera with 20MP that only has full auto exposure and provides no way of changing things, will not allow you to get the same quality of image. It would be like buying a vehicle solely based on gas mileage and not taking into account what you want to do with it. Sure a Prius gets fantastic mileage, but if you need a vehicle to haul things around, you'd be far better off with a pickup truck. So buy the camera that best fits the purpose for which you intend to use it.
On a technical level, the number of pixels is not anywhere nearly as important as the size of the sensor and the size of the pixels. The larger the sensor, the larger the pixels can be. Having a large sensor not only allows for larger pixels, but for of them too. This has a huge impact on image quality because as the pixel size increases so does the dynamic range (DR). DR is the sensor's ability to render detail in highlights and shadows. Cameras with more DR can render those details in situations where the difference in brightness between the shadows and highlights is extreme such as on bright sunny days when there can by as much as 6-8 stops difference between the brightness of the shadows and highlights - or more.
Furthermore, as the pixel size increases, the pixel therefore can capture more light during any given exposure purely because it has a larger surface area. This larger surface area will allow the pixel to be struck by more photons which result in a stronger signal for which the camera then uses to interpret color and brightness. As the pixel size decreases, so does the signal, and therefore the camera will need to amplify the signal. Because you can't amplify the signal without also amplifying the noise, cameras with small pixels will have much more noise even at low ISOs such as 100-400. This can easily be seen in any photo taken with a smartphone. While the image may look fine in the 4" LCD of the phone, once viewed larger on a print or on a computer monitor, all of the noise and imperfections become painfully obvious.
All of this explains why a camera like the Sony A7S II with "only" 12MP will produce a far better looking image than a point and shoot with 20MP or a smartphone with 41MP.
2016-09-04 1:04 pm
Disabuse yourself of the notion that the quality of an image goes up with the number of megapixels. Marketers would like you to believe that. I have a 10mp camera that has taken pictures that have won awards. The only thing the number of megapixels is related to is how large a print you can make or how much you can crop an image for a better composition. Furthermore, in terms of the size of the print, a more important factor is viewing distance. In small sensors, a greater number of pixels leads to poorer quality, as qrk has noted. There are other features of sensors that are more important: high ISO performance and dynamic range. Both of these suffer when sensor-makers put too many pixels on a sensor. They know better, but they do it because of misguided consumers.
2016-09-03 11:45 pm
What size camera are you looking for?
If pocket sized, 16 Mp is too many pixels for a point & shoot (better off with 8 to 10Mp).
For larger sensors better then 2x crop, any of the entry level cameras Canon, Nikon, Pentax, or Sony have to offer are all good.
If pocket sized, 16 Mp is too many pixels for a point & shoot (better off with 8 to 10Mp).
For larger sensors better then 2x crop, any of the entry level cameras Canon, Nikon, Pentax, or Sony have to offer are all good.
2016-09-10 12:20 pm
The number of Mps is the last thing to think about, since all cameras these days have more than 10Mps, which is more than enough except at the uppermost levels of pro photography.
Look at the general practicalities of the camera for what you want to do.
Look at the general practicalities of the camera for what you want to do.
2016-09-04 4:59 pm
An old Nikon D40 with 6.1 MP can take magazine quality photos .
收錄日期: 2021-04-21 21:35:37
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