How to remotely control the focal length of the camera

How does drone photography focus on images?

Click on the screen focus, or you can set the custom button focus in the upper right corner. In the application, go to the remote control settings, find the custom button, and then select autofocus. This way, when you press the custom button, it will automatically focus. It is recommended to read more instructions, which will have very detailed answers.

How does the camera focus?

There are two kinds of SLR focusing in photography: manual focusing and autofocus.

The default is autofocus. As long as the shutter is pressed halfway, the camera will beep to indicate that it is in focus. But when shooting at macro or through the glass, the focus button is almost pressed, and the beep is still out of focus for a long time!

Adjust the focal length, change the posture and find the angle, but you can't get the right focus and the desired effect! Soft and cramped fingers, but nothing can be done.

Now the autofocus function of SLR cameras is very powerful, so friends are used to autofocus. In fact, manual focusing is more convenient and more operable in dark conditions or when the contrast of the subject is small.

So, what specific situation is more suitable for manual focusing?

1. Miscellaneous scenarios

If there are too many elements or various similar objects in the shooting scene that interfere with the accurate focusing of the camera, you can focus manually, such as crowded people on messy streets, buildings with similar shapes and so on.

2. The theme is not recognized

When there is an obstacle in front of the subject, or when the subject is too small and the background is complex, the camera is prone to confusion and can't focus accurately, which often happens when shooting through the glass or at a macro.

3. Low contrast

This must happen to you often. When shooting jewelry, cups or objects in reflection, life and death just can't focus. Don't lose your camera, try focusing manually. In addition, when shooting in a dark environment, there is no choice but to focus manually.

Manual focusing of SLR can be completed in three simple steps:

1. Set to manual focus mode.

Switching the focusing modes of SLR cameras can generally be achieved by pressing the keys on the lens, with AF for auto focus and MF for manual focus. The key positions of different cameras are different, and some are near the lens interface on the front of the camera body.

Of course, some cameras can also set the focus mode switching function on the custom key (Fn), so just press the custom key when using it.

Adjust diopter

After switching to manual focusing mode, you can adjust the diopter of the viewfinder, because if the diopter is not accurate enough, manual focusing will not be accurate.

Generally, you can turn or slide the diopter adjustment controller next to the viewfinder while your eyes are facing the viewfinder, so as to adjust the image clearly when focusing. Of course, different cameras have different settings.

Use the focus ring

When focusing manually, it is difficult to judge whether the focus is accurate only through the viewfinder because the picture is too small to see clearly. At this time, the focus ring should come out.

There is a distance mark on the focus ring. When focusing, twist the focusing ring back and forth near the focus, slowly narrow the range, and then determine the focus.

Three simple steps. If the autofocus effect is not good in the future, start it manually in minutes. Generally, the adjustment orientation is first created in the top view, and then the height position is adjusted in the side view. If you want to adjust the focal length, you can select the camera and click Modify in the parameter bar to adjust it.

How to realize remote production by reading stream shooting? How to fully control the whole shooting process?

This problem can be solved by using reading stream shooting and NBOX. By streaming NBOX, the shot video material can be uploaded to the cloud in real time, and the material can be sent back for reading and shooting, so that the later staff can download the material quickly and enter the later stage at high speed, which greatly shortens the circulation time of the material and improves the production efficiency.

Multi-camera monitoring can be supported in streaming shooting, for example, hanging an NBOX on each camera in the studio can monitor four cameras at the same time. In streaming shooting, you can share the project/camera through the link, and click the link to see the real-time shooting picture and look back at the material. You can also initiate a voice conference in the monitoring scene to exchange monitoring opinions in real time. . The subjects praised it greatly.