Wide-angle lenses have greater depth of field through all F-stops. My depth of field may take in a zone of focus from 6 feet to infinity. This is a technique used by street photographers who like to shoot from the hip.
No focusing needed. This is how disposable cameras work. They have a large, fixed F-stop, which provides great DOF. Your proximity to your subject also affects your depth of field. The closer you are, the shallower the DOF. Bring your camera to the bar, and chat with strangers and ask them to make their portrait see my OLD COLONY project, where I bought some folks beers, chatted with them about their life stories, and made their portraits.
Or bring your camera to the arcade, or anywhere you go! Try visiting a new place in your city, or travel! Invest in yourself! Sure sometimes the choice might be at worst, boring or bad, but the potential upside is unlimited! Be notified when new workshops are live here.
Always have your camera around your neck, wrist, or shoulder. Please, someone correct me if I'm wrong. Of course, aperture has an r in it. Sorry, you're wrong. The f number is a fraction: it means the aperture is that fractional part of the focal length of the lens. It isn't related to the back focus distance, which I think is what you're describing. And another thing, re Steve's question. The relationship between aperture and depth of field is not completely simple.
It also involves the focal length of the lens, and the acceptable size of what's called the 'circle of confusion' on the film. You can read about these variables in optics FAQs on the Web. For practical purposes, the size of the acceptable circle of confusion is usually taken to increase linearly with the size of the film. But for a given aperture, the depth of field decreases with something like the square of the focal length of the lens.
So there's a net loss of DOF in larger formats. And another thing, re Terry's post, of course he and I are saying the same thing. The distance from the aperture hole to the film plane, like he says, is pretty much the focal length, given a symmetrical lens. My mistake, sorry. Brain not firin' on all cylinders today. As somebody already said, this phrase comes from the old-time press photogs who used Speed Graphics and Graflexes. It actually comes from using the old-style bulb flashes: with the slow films of the time remember that new-in-the-lates Plus-X was considered blindingly fast at ASA 64!
If you could grab the shot at exactly the right instant, you were reasonably assured of a printable negative It's from the olden days when people actually used to focus lenses with their fingers.
There are a lot of others like me, and many who shoot cameras with NO AF!
0コメント