Answer:
Effect Of The Image Sensor Size On The Bokeh Effect
Besides the outward appearance, DSLRs and compact digital cameras also vary fundamentally in their internal structure. The most distinctive difference is found in the image sensor, the component for receiving light and producing images. While compact digital cameras generally have an image sensor with a size of 1/2 inch, the APS-C format image sensor, which is commonly used on DSLRs, has an area that is approximately 10 times larger. A larger image sensor allows each of the pixels to capture more light, and this also helps to add numerous advantages to the electrical properties, such as a low level of noise. Also, the impression of the resulting image changes drastically with the background blur. In this respect, DSLRs, which allow the lens to be exchanged, are also a notch above compact digital cameras. The difference in the bokeh effect based on the image sensor size also depends largely on the focal length of the lens. If we compare the two images with the same composition, the focal length tends to be shorter (wider angle) when the area captured by the image sensor is smaller. This, in turn, makes it more difficult to create background blur. Therefore, one of the reasons the resulting image turns out very different in the case of a DSLR can be attributed to the size of the image sensor.
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