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But whether you’re looking at a screen or through a viewfinder, you still need to be aware of two things: the boundaries of the frame, and what’s contained within them. This awareness develops with practice, and with digital cameras you can help it develop by looking carefully at playback images too.
However, the sad fact is that, however carefully you look at the screen or the viewfinder, what you see still isn’t necessarily what you get. To complicate matters further, there are different types of viewfinder, which behave quite differently, as well as the camera-back screen. In simple terms, there are two main types of viewfinders. These are direct-vision and reflex.
Direct-vision finders are found on compact cameras – if they have a viewfinder at all; many digital compacts don’t bother. A direct-vision viewfinder is essentially just a small window. The window’s frame may correspond to the borders of the image you’ll shoot, or there may be a marked area within the window to show the actual picture area. In this case, round the edges of the finder you can see stuff which won’t appear in the final picture.