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What is the resolution of the best digital cameras? It is the size of the image that a camera produces in megapixels. If the digital image recording is on film, the resolution will depend on the image file size, average photo size, lens sharpness, grain levels, and diffraction. If you are using a camera with an image sensor, the factors that determine resolution include pixel pitch, ISO, diffraction, AV mode, the size of the sensor, and lens sharpness. Additionally, the condition of the equipment, atmospheric blur, motion blur, focus, and camera shake influence the clarity of the image.
KEY TAKEAWAYS:
Let us discuss two of these elements in detail.
Smaller pixels require a better lens quality. For example, an eight-micrometer pixel has twice the pixel pitch of a four-micrometer pixel and four times the area. This result means that with a lens that provides sharp details for the eight-micrometer pixels, it is not possible to offer enough sharpness for the four-micrometer pixels. So, there are two places where you can get small pixels:
You may remember diffraction in water. If there is a barrier with a small hole to allow water, the flow will bend near the hole. A smaller hole means more bending. The same concept is similar in photography, where the camera aperture is the hole that allows light. At higher f-stops (smaller apertures), diffraction affects your resolution and image sharpness. Just because of diffraction, there is a physical limit on resolution.
You can see the resolution of a lens irrespective of pixel count and sensor size on MTF charts. But you can also look at your lenses to see if they are sharp enough for your shoots. Pixel-level sharpness is the highest degree of lens sharpness, which means that a sharp lens can resolve image data at the pixel level without interfering with the neighboring pixel. This sharpness depends on the lens and the pixel pitch of the cameras.
You do not have to go out and purchase a camera with the highest megapixel camera. Pixel count and megapixel mean nothing without the right technique and settings. Remember that your goal is not to record the greatest detail of an object. Do not be obsessed with sharpness because photography is all about storytelling and technique. You should also be aware of what is RAW images on a digital camera as it affects image size and quality.
Let’s begin with the different ways you can achieve the highest resolution.
Insider Tip
If the digital image recording is on film, the resolution will depend on the image size, lens sharpness, grain levels, and diffraction. If you are using a camera with an image sensor, the factors that determine resolution include pixel pitch, ISO, diffraction, the size of the sensor, and lens sharpness.
What is pixel count?
The smallest component of a digital image sensor is the pixel; their quantity is important, but they fail to provide any detail about the camera’s resolution. The representation of pixel count is in megapixels, where 1MP means one million pixels.
Why is size important in printing?
Most printing services require a certain pixel density in the image – PPI so that you can get a good rendering of the image. Typical PPI values in printing range from 150 to 300 PPI (Pixels Per Inch). For example, to print a 4 x 6-inch page at 300PPI, your file print size needs a short side with at least 1200 pixels (4 x 300) and a long side at 1800 pixels (6 x 300). In other words, you will need at least a pixel size of 1200 x 1800 for larger prints.
What is an atmospheric blur?
Light refracts in water and other substances like air. Although it is not easy to notice at short distances, it becomes visible when shooting distant subjects with a telephoto lens.
STAT: The physical size of the Nikon D7100 sensor is 23.5 x 15.6mm, while the sensor size of the Nikon D750 is 35.9 x 24.0mm. Therefore, the sensor size in Nikon D750 is 2.3x larger or 52% larger in linear width than the sensor area in Nikon D7100. (source)
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