The depth of field (depth of focus) of a macro lens is about 1 to 2 mm. Even with the recent improvements in AF performance, it is not possible to pinpoint the focus with such precision. In addition, since both the camera and the subject are moving, the area that is in focus is also moving. A tripod can stop the camera movement, but there is no guarantee that the subject will be in focus when you release the shutter, even if you are lucky enough to get the AF to focus on the spot you want because the subject is moving. Moreover, a tripod is not recommended because it greatly restricts the framing of the image due to fine movement of the camera.
So, what to do is to use MF (manual focus) to focus on the target area to some extent, and then move your body (or hands) back and forth to make fine adjustments. Of course, the camera will never focus exactly on the target area, and the focus surface will move back and forth. I take a series of shots at the same time that the focus surface passes the target area. If one of the shots in the sequence is in focus, it is OK. It is very convenient with mirrorless cameras because the image you took is instantly displayed in the viewfinder, so you can quickly determine the timing and whether the image is in focus or not.
0 件のコメント:
コメントを投稿