Depth-of-field is a quarter of an inch or so when you shoot closeup. You get great bokeh when the background gets elements thrown out-of-focus. The “soft”area can be manipulated to your liking. The sharp spot attracts onlookers like bears to honey.  The small black one can fit on a shoelace. It is the size of a nickel. Size doesn’t matter when all your electronic gadgets stop working or run out of power. A compass will align you with magnetic north. True north is slightly off the North mark. These objects led me in a direction I had not expected.