Quick zoom
‘Quick Zoom is particularly useful for macro and portrait photographers’
Usually, when you zoom into a captured image, the camera will zoom further into the image with each click of the control dial. This is also the case on many other cameras, and it allows you to zoom into a certain part of the image when used in conjunction with the directional controls.
Most of the time, however, it’s more helpful to have the camera jump deep into the centre of the frame, and then give you the option to adjust this if you need to. This is what the Quick Zoom function allows. Most models offer 2x, 4x, 8x and 16x magnification options, and this is the first point the camera will reach when you start zooming. The middlemost 8x setting provides the best approximation as to what you see when viewing an image at 100% in an image-editing program, so this is perhaps the best option if you want to check focus and sharpness, and whether depth of field extends as far into the frame as you want.
it is most useful for those who need to do this with any frequency, such as portrait photographers looking to see whether eyes are in focus, or those shooting macro and close-up images.