​What circumstances need to use manual focus

There was a time when autofocus seemed like something out of science fiction. I mean, canvas prints it doesn't exist in reality, does it? Other than that, how does it know exactly where you want to focus? The only point-and-shoot camera that can be called autofocus actually focuses at infinity, so the picture looks good, but the focus isn't perfect.

Now, fiction becomes reality. The AF system has become standard on all cameras. Not only does it work, but it works well. But it doesn't always work perfectly. The AF system may have a right or wrong focus, or it may not find any focus. Sometimes you can't even move the shutter. So, canvas photos online here are 10 situations where you should shut down the AF system and go back to manual focus.

1. Low-light environment

In low-light environments, objects have very little contrast, and the AF system relies on light and contrast to work. Your camera may have an auxiliary focusing light. But in an environment like the one above, the focus assist lights don't work either. Although the above image appears to be normal exposure, panoramic prints australia the light is actually quite weak. The exposure time of this picture is as long as 30s.

2. Low contrast objects

When you face a place like a smooth wall, no matter how much light there is, the camera can't focus. You can focus on other details, hold the shutter half down to lock the focus, and then pan the camera to recompose.

3. Photograph wildlife

Most wild animals have an excellent sense of hearing. No matter how good your AF system is, it always makes a sound. Even the slightest focusing sound can alarm an animal. If you want the most natural shot, turn off autofocus.

4. Shoot landscapes

When photographing landscapes, you usually want the mountains to be clear from the foreground to the distance. This requires closing down the aperture to increase the depth of field and using hyper focus. Remember to turn off autofocus, or the camera will refocus when you press the shutter, usually at infinity.

5. HDR or surround exposure

Making HDR photographs requires that all individual photographs have the same focus. With autofocus, the focus of each photo changes slightly.

6. Shoot moving objects

When shooting high-speed objects, the camera tries to change focus with distance, but usually fails. The photo below, using autofocus and combo, doesn't look good.

7. Shoot through glass

Shooting through glass is generally not a good idea. It should be avoided. But sometimes it is unavoidable, such as on the plane, in the aquarium and so on. The problem with the AF system at this point is that it may focus on reflections or glass. So shut it down.

8. Take portraits

The golden rule of portrait photography is to focus on the eyes. In addition, large aperture and shallow depth of field effects are often used. But if the AF system focuses on the eyebrows or nose, the eyes blur.

9. Macro

Autofocus is difficult to work with in macro photography. The depth of field is so shallow that the camera can't tell where to focus. You have to take control.

10. Composition needs

If the focus of the camera is fixed in the center, or there is not enough focus on the edges, it is inconvenient to make composition. All in all, collage on canvas autofocus is good, but not all-powerful. A good photographer knows when to take control.