When buying digital cameras one of the important specifications to check is the megapixel count, with more pixels often comes a better digital camera.
The megapixel count is the number of pixel sensor points that receive photons and register their impact to create a digital image. One megapixel is a million pixels with the maximum resolution of images created by the camera being limited by their sensor size. Digital images are made up of small squares created with the information received by each pixel with each having colour and light level information. Having too few pixels will leave images with visible blockiness and fail to preserve fine detail.
The megapixel count for a given camera can be calculated by multiplying the height by the width of the maximum size image the camera can take and alternatively a rough idea of the maximum resolution can be gained by doing the reverse.
There are arguments for and against the advantages of more megapixels with some conditions not favouring higher megapixel counts such as low light levels where too few photons would hit each pixel to give a good image resulting in higher image noise. Higher counts are more demanding on the camera's processor and create larger files resulting in longer processing and upload to storage times, this can limit a photographer's ability to take multiple shots. The larger file size also means a memory card will not be able to store as many shots. Finally very high counts can lead to 'noise', that is adjacent pixels interfering with one another and is visible as pixels that are noticeably off colour compared to those around them, usually creating a speckled appearance on dark parts of the image.
The sensitivity to noise varies from camera to camera, some deal with it better than others making it a good idea to look at sample images or try digital cameras for yourself before buying.
On the positive side higher megapixel numbers will give better detail in images as well as avoid any blockiness. The greater image area and detail also means that images can successfully be cropped, that is reduced in size, a significant benefit for less experienced photographers who may want to reframe an image to more accurately frame the subject. Higher numbers of pixels are also better if a photograph is intended to be displayed in a larger size such as a large print or a poster as they have more detail so when expanded do not immediately display blockiness.
Manufacturers are well aware of the advantages and disadvantages of higher megapixel counts as well as their customers' perception that more is always better which leads them to match the higher pixel counts with higher end hardware and better cameras making the pixel count a good indication of the overall quality of the camera.
In summary when looking to buy new digital cameras one of the easiest indications of quality is the megapixel count, though this should not be seen as outweighing the other features of digital cameras it is a good guide to where the manufacturer is aiming the camera in the market.
High mega pixel cameras are also becoming a key feature of many new release mobile phones. As with the cameras, a higher mega pixel camera often gives greater capability as with the LG Optimus 2X.
The megapixel count is the number of pixel sensor points that receive photons and register their impact to create a digital image. One megapixel is a million pixels with the maximum resolution of images created by the camera being limited by their sensor size. Digital images are made up of small squares created with the information received by each pixel with each having colour and light level information. Having too few pixels will leave images with visible blockiness and fail to preserve fine detail.
The megapixel count for a given camera can be calculated by multiplying the height by the width of the maximum size image the camera can take and alternatively a rough idea of the maximum resolution can be gained by doing the reverse.
There are arguments for and against the advantages of more megapixels with some conditions not favouring higher megapixel counts such as low light levels where too few photons would hit each pixel to give a good image resulting in higher image noise. Higher counts are more demanding on the camera's processor and create larger files resulting in longer processing and upload to storage times, this can limit a photographer's ability to take multiple shots. The larger file size also means a memory card will not be able to store as many shots. Finally very high counts can lead to 'noise', that is adjacent pixels interfering with one another and is visible as pixels that are noticeably off colour compared to those around them, usually creating a speckled appearance on dark parts of the image.
The sensitivity to noise varies from camera to camera, some deal with it better than others making it a good idea to look at sample images or try digital cameras for yourself before buying.
On the positive side higher megapixel numbers will give better detail in images as well as avoid any blockiness. The greater image area and detail also means that images can successfully be cropped, that is reduced in size, a significant benefit for less experienced photographers who may want to reframe an image to more accurately frame the subject. Higher numbers of pixels are also better if a photograph is intended to be displayed in a larger size such as a large print or a poster as they have more detail so when expanded do not immediately display blockiness.
Manufacturers are well aware of the advantages and disadvantages of higher megapixel counts as well as their customers' perception that more is always better which leads them to match the higher pixel counts with higher end hardware and better cameras making the pixel count a good indication of the overall quality of the camera.
In summary when looking to buy new digital cameras one of the easiest indications of quality is the megapixel count, though this should not be seen as outweighing the other features of digital cameras it is a good guide to where the manufacturer is aiming the camera in the market.
High mega pixel cameras are also becoming a key feature of many new release mobile phones. As with the cameras, a higher mega pixel camera often gives greater capability as with the LG Optimus 2X.
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