When we take a photograph the shutter snaps open and closed. The aperture is how wide that doorway to our camera opens. Imagine the shutter as a doorway, the stops go behind the door and so a large stop say F/16 only allows the door to open a little. At f/30 and we have a tiny pinhole and at f/3.5, on most lenses, it wide open. On my 35 mm prime lens, wide open is even wider at f/1.8.
Wide open in photography means the widest aperture that the lens will give you. This is often around f/4.5 with most lenses. I can go wider with my prime lens which will go to f/1.8. Take a look at this wide open shot of some beer cans:
It’s Sunday morning and so once again I share my thoughts with readers. Today, I have bokeh on my mind. What’s that? I think it’s Japanese for blur; anyway, it’s what photographers call the blur in some wide aperture photos like the one below. I want to get sharp portraits with blur in the background. I also want to be able to take better photos under fluorescent lights so I ordered a special filter. In fact, I ordered a set for my 35mm prime lens and another set for my 18 to 105mm lens. At least I didn’t buy a new camera or a lens. I have some self-control; not enough to resist buying a light meter, though.